Complications After Horse Castration: What Is Normal and When to Call a Vet

By Dr Duncan Houston

Castration, commonly called gelding, is one of the most frequently performed surgical procedures in horses. Most horses recover without a serious problem, but “routine” does not mean risk-free.

The difficult part for owners is knowing what is expected. Mild swelling, stiffness and a small amount of blood-stained drainage may be normal after an open castration. Streaming blood, tissue hanging from the wound, rapidly increasing swelling, fever, colic or loss of appetite are not.

What matters most is recognising when normal postoperative inflammation has crossed into haemorrhage, infection, herniation or another complication that needs urgent treatment.

Quick Answer

Some scrotal and sheath swelling, mild stiffness and a small amount of blood-tinged drainage can be normal after routine open castration.

Call your veterinarian immediately if blood is streaming or spurting, pink or red tissue protrudes from the incision, swelling becomes severe or rapidly increases, the horse develops fever or colic, or they become dull and stop eating.

Aftercare depends on the surgical technique. Routine open castration often requires controlled exercise from the following day to encourage drainage, while closed, primarily sutured or cryptorchid castrations may require a more restricted rehabilitation plan.

How Common Are Castration Complications?

Minor complications are more common than many owners realise, but serious complications remain uncommon.

A prospective study following 392 equids for 30 days after castration reported at least one postoperative complication in 11.2% of cases. Swelling was the most common problem, followed by infection and stiffness of gait. Serious complications and deaths were rare. (PubMed)

A larger 2026 field study involving 612 stallions reported complications in 23.7%, but most were scrotal swelling or seroma formation. Haemorrhage, evisceration, funiculitis and infection were much less common. Differences between studies partly reflect how minor swelling is defined and how closely horses are followed after surgery. (PMC)

The practical message is reassuring:

Most horses recover well, but close observation is still essential because the uncommon complications can become life-threatening very quickly.

What Is Normal After Horse Castration?

Expected recovery varies according to whether the surgery was open, semi-closed, closed or performed through an inguinal or laparoscopic approach.

After a routine open castration, the following may be normal:

• A slow, occasional drip of blood during the first few hours

• Clear or lightly blood-stained drainage

• Mild to moderate swelling of the scrotum

• Some swelling extending into the sheath

• Mild stiffness when the horse first begins moving

• Temporary soreness when the hindlimbs are moved

• Gradual reduction in drainage as the wounds heal

• A good appetite and otherwise normal behaviour

The incisions in an open castration are intentionally left unsutured so that blood, serum and inflammatory fluid can drain rather than becoming trapped underneath the skin.

Swelling may increase during the first few days before improving. The horse should still be bright, interested in food and willing to move.

What Is Not Normal?

Contact your veterinarian if you notice:

• Blood flowing in a continuous stream

• Spurting or pulsating blood

• Blood pooling beneath the horse

• Pale gums, weakness or rapid breathing

• Rapidly increasing swelling

• Swelling so large that the horse walks abnormally

• A wound that has closed while swelling continues to increase

• Thick yellow, green or foul-smelling discharge

• Fever

• Depression or reduced appetite

• Persistent or worsening lameness

• Colic signs

• Diarrhoea

• Difficulty urinating

• Tissue hanging from the incision

• A wound that repeatedly drains and never heals

The owner’s most useful question is not simply, “Is there swelling?”

It is:

Is the swelling stable and expected, or is the horse becoming painful, febrile, dull or progressively worse?

When Is This an Emergency?

Seek emergency veterinary assistance immediately if your horse has:

• Streaming or spurting haemorrhage

• Blood loss that is not clearly slowing

• Pale, grey or white gums

• Weakness, trembling or collapse

• A rapid heart rate with obvious blood loss

• Pink, red, yellow or dark tissue protruding from the incision

• Intestine or suspected abdominal tissue hanging from the wound

• Severe or rapidly worsening colic

• Marked abdominal enlargement

• Severe pain

• Difficulty standing

• Signs of shock

• Breathing difficulty following anaesthesia

• Severe swelling accompanied by an inability to urinate

Do not walk a horse with severe haemorrhage or tissue protruding from the castration wound.

Do not wait until morning to see whether it improves.

How Worried Should You Be?

Lower Concern

The horse is:

• Bright and eating

• Passing normal manure

• Urinating normally

• Comfortable at rest

• Showing only mild swelling

• Producing a small amount of clear or blood-tinged drainage

• Moving with mild initial stiffness that improves

What to do: continue the veterinarian’s aftercare plan and inspect the site at least twice daily.

Moderate Concern

The horse has:

• Increasing scrotal or sheath swelling

• Reduced drainage

• More discomfort when moving

• Mild appetite reduction

• A wound that appears to be sealing

• Swelling that is not beginning to improve

What to do: contact your veterinarian the same day. The incision may need to be examined or reopened under sedation to restore drainage.

High Concern

The horse has:

• Fever

• Hot, painful swelling

• Pus or foul-smelling discharge

• Depression

• Reduced appetite

• Persistent lameness

• Colic signs

• Recurrent bleeding

• A draining wound that is not healing

What to do: arrange urgent veterinary assessment. Infection, haematoma, abscessation or deeper spermatic cord disease may be present.

Critical

The horse has:

• Streaming or spurting blood

• Pale gums or collapse

• Tissue protruding from the incision

• Severe colic

• Rapid deterioration

• Signs of shock

What to do: treat this as an immediate emergency.

Why Does the Surgical Technique Change the Aftercare?

Not every castration wound should be managed in the same way.

Open Castration

In a routine open castration:

• Scrotal incisions are left open

• Drainage is expected

• Controlled movement is often important

• Mild swelling is common

• Healing occurs from the inside outward

Closed or Primary-Closure Castration

In a closed or primarily sutured castration:

• The vaginal tunic and sometimes the skin are closed

• The wound is intended to heal by primary closure

• Drainage may not be expected

• The horse may require more restricted activity

• Incisional swelling or haematoma may be the main concerns

A study of 159 horses castrated with primary wound closure found that scrotal haematoma, colic, fever and peri-incisional oedema were among the more common short-term complications. (PMC)

Cryptorchid Castration

A cryptorchid horse has one or both testicles retained in the inguinal canal or abdomen.

These procedures may involve:

• Inguinal surgery

• Abdominal surgery

• Laparoscopy

• General anaesthesia

• Sutured incisions

• A longer period of restricted exercise

Do not apply routine open-castration instructions to a cryptorchid operation unless the surgeon specifically approves them.

Complication 1: Postoperative Swelling and Oedema

Swelling is the most common complication after castration.

The scrotum is at the lowest part of the horse’s body, so fluid naturally collects there. Swelling may also extend forward into the sheath and lower abdomen.

Mild swelling is expected. It becomes a problem when:

• It increases rapidly

• It becomes hot or very painful

• It interferes with walking

• It prevents normal urination

• The incision seals prematurely

• The horse develops fever or depression

• Drainage stops while the swelling continues

When an open incision seals too early, fluid and bacteria can become trapped underneath the skin. This can produce a seroma, abscess or infected pocket.

Treatment may include:

• Veterinary examination

• Sedation and reopening of the incision

• Anti-inflammatory medication

• Controlled exercise

• Cold-water therapy

• Culture of abnormal discharge

• Antibiotics when infection is present

Owners should not place a finger, instrument or blade into the wound themselves. A horse can kick, important tissue can be damaged and contamination can be pushed deeper.

Complication 2: Haemorrhage

A small amount of bleeding shortly after surgery can be normal.

Serious haemorrhage most commonly comes from the testicular artery, although veins and skin vessels can also bleed.

Normal Bleeding

This may look like:

• Slow, countable drops

• A drip that becomes progressively slower

• A small amount of blood on the hindlimbs

• Blood-tinged drainage without pooling

Concerning Bleeding

Call your veterinarian if:

• The drops become too rapid to count

• Blood forms a steady stream

• Blood spurts with the heartbeat

• A pool develops beneath the horse

• Bleeding does not clearly slow

• The horse becomes weak, pale, sweaty or unsettled

Do not assume the problem is safe simply because the blood is coming from an expected surgical site.

Significant internal bleeding can also occur without dramatic external blood loss. Warning signs include:

• Pale gums

• Rapid heart rate

• Weak pulses

• Sweating

• Depression

• Weakness

• Abdominal discomfort

• Collapse

Older and heavier stallions may have larger vessels and a higher complication risk, making careful surgical planning and haemostasis particularly important. (PMC)

How Is Severe Bleeding Treated?

Treatment may require:

• Sedation or repeat anaesthesia

• Locating and clamping the bleeding vessel

• Surgical ligation

• Packing the scrotum

• Intravenous fluids

• Blood testing

• Blood transfusion

• Hospital referral

• Laparoscopic control of internal haemorrhage in selected cases

Once the spermatic cord has retracted upward, finding the bleeding vessel can be difficult. This is why prompt intervention is far easier than waiting until the horse has lost a major quantity of blood.

Complication 3: Evisceration or Eventration

Post-castration evisceration occurs when abdominal tissue passes through the inguinal canal and emerges from the castration incision.

The protruding structure may be:

• Omentum

• Small intestine

• Another abdominal structure

This is uncommon but potentially fatal.

Merck Veterinary Manual notes that evisceration most often occurs during the first four hours after open castration, although the risk can remain for up to six days. Adult stallions and breeds with larger inguinal rings, including Standardbreds, draft horses, Tennessee Walking Horses and American Saddlebreds, may be at greater risk. (Merck Veterinary Manual)

What Does Evisceration Look Like?

You may see:

• Pink, red or yellow tissue hanging from the incision

• A loop of smooth, glistening bowel

• A rope-like or sheet-like structure

• Tissue that becomes longer as the horse moves

• Colic, sweating or distress

Owners cannot reliably distinguish harmless-looking fat from omentum or intestine.

Anything hanging from a castration wound should be treated as an emergency.

What Should You Do?

1. Keep the horse completely still.

2. Call your veterinarian immediately.

3. Do not walk or lunge the horse.

4. Do not push the tissue back inside.

5. Do not pull, cut or manipulate it.

6. Support the tissue with a clean towel or sheet.

7. Keep it off the ground.

8. If instructed, keep exposed tissue moist with sterile saline and a clean covering.

9. Prevent the horse from stepping on it.

10. Prepare for referral transport only under veterinary direction.

Merck specifically advises keeping the horse quiet and supporting the exposed structure with a towel to reduce further stretching, contamination and tissue damage. (Merck Veterinary Manual)

Even if the protruding structure appears to be only fat, the horse still requires immediate examination.

Complication 4: Incisional Infection

Postoperative infection commonly becomes noticeable several days after surgery rather than immediately.

Signs include:

• Increasing heat

• Painful swelling

• Fever

• Depression

• Reduced appetite

• Lameness

• Thick yellow or green discharge

• Foul smell

• Incisions that have sealed over

• Swelling that improves and then suddenly returns

The wound can look closed and relatively clean on the surface while infected fluid remains trapped underneath.

Treatment may involve:

• Reopening the wound

• Restoring drainage

• Lavage

• Anti-inflammatory medication

• Bacterial culture

• Targeted antibiotics

• Ultrasound

• Referral for deeper infection

Antibiotics alone may not resolve an infected, poorly draining castration wound. If infected material is sealed underneath the skin, drainage is usually the critical first step.

Complication 5: Septic Funiculitis or Scirrhous Cord

Septic funiculitis is a deeper infection involving the remaining spermatic cord.

A chronic infected cord is commonly called a scirrhous cord.

It may become apparent:

• Within weeks

• Several months later

• Occasionally years after castration

Signs may include:

• Persistent scrotal swelling

• A firm mass in the groin

• A wound that repeatedly opens and drains

• One or more chronic sinus tracts

• Intermittent fever

• Pain in the inguinal region

• Failure of the original incision to heal properly

The infection can extend high into the inguinal canal or abdomen. Long courses of antibiotics rarely cure a large infected cord stump because abnormal and infected tissue remains in place.

Definitive treatment usually requires surgical removal of the affected spermatic cord at a referral hospital. Septic funiculitis is among the recognised serious complications reviewed in contemporary equine castration literature. (Beva)

Complication 6: Colic and Peritonitis

Mild transient discomfort can occur after anaesthesia or surgery, but persistent colic is not expected.

Possible causes include:

• Pain at the surgical site

• Anaesthetic-associated reduced gut movement

• Feed or routine changes

• Haemorrhage

• Inguinal herniation

• Peritonitis

• An unrelated gastrointestinal problem

Peritonitis is infection or inflammation of the abdominal lining. It can occur if contamination moves through the inguinal canal or if deeper tissue becomes infected.

Concerning signs include:

• Repeated pawing

• Flank watching

• Lying down

• Rolling

• Reduced manure

• Fever

• Rapid heart rate

• Depression

• Reduced appetite

• Diarrhoea

• Abdominal guarding

Do not assume postoperative colic is simply soreness from castration. A horse with persistent or recurring abdominal pain needs veterinary examination.

Complication 7: Tetanus and Clostridial Infection

Castration creates an open wound, and horses are exceptionally susceptible to tetanus.

Tetanus vaccination status should be checked before surgery. Current AAEP guidance recommends that a previously vaccinated horse undergoing surgery should receive a tetanus toxoid booster if six months or more have passed since the previous booster. Horses with unknown or inadequate vaccination history require a primary vaccination plan and may also need temporary protection with tetanus antitoxin, depending on the situation. (AAEP)

Possible tetanus signs include:

• Stiffness

• Difficulty chewing

• Third-eyelid prolapse

• Muscle spasms

• Sawhorse stance

• Sensitivity to sound or touch

• Difficulty swallowing

Do not treat castration as an acceptable reason to “catch up with the vaccine later.”

The protection plan should be established before or at the time of surgery.

Complication 8: Hydrocele

A hydrocele is a fluid-filled swelling associated with the vaginal tunic or remaining cord structures.

It may appear months or years after castration as:

• A soft or fluctuant scrotal swelling

• A painless enlargement

• A swelling that gradually becomes larger

• A mass that changes size

Hydroceles are usually not emergencies, but they need veterinary examination because hernia, infection, haematoma and other masses can look similar.

A small, stable and painless hydrocele may simply be monitored. Large or uncomfortable hydroceles may need surgical removal.

Complication 9: Penile or Preputial Problems

Some sheath swelling is common after castration.

Call your veterinarian if:

• The penis remains protruded and cannot be retracted

• The sheath swelling becomes extreme

• The horse cannot urinate normally

• Urine comes out only in small amounts

• The penis becomes cold, dry, dark or severely swollen

• Tissue appears to be protruding through the castration wound

Persistent penile prolapse can lead to swelling, trauma and impaired blood supply. It should not be left exposed for hours while waiting to see whether it retracts by itself.

Complication 10: Continued Stallion-Like Behaviour

Castration removes the testicles, but it does not instantly remove learned behaviour or the brain’s previous hormonal development.

A recently castrated horse may continue to:

• Call to mares

• Display flehmen

• Mount

• Erect the penis

• Guard mares

• Fight other males

• Show territorial behaviour

Merck reports that stallion-like behaviour can persist in geldings even without active testicular hormone production. Persistent behaviour does not automatically mean that the horse was “proud cut.” (Merck Veterinary Manual)

However, consistently intense stallion behaviour should be investigated if:

• Only one testicle was removed

• Both testicles were not confirmed before surgery

• The horse was previously labelled cryptorchid

• Behaviour remains unchanged months later

• The horse appears capable of breeding mares

• The surgical history is uncertain

Blood testing for anti-Müllerian hormone or testosterone may help identify retained testicular tissue. Anti-Müllerian hormone typically takes around ten days to two weeks to return towards baseline after complete castration, so testing must be timed appropriately. (vetmed.ucdavis.edu)

Can a Recently Castrated Horse Still Get a Mare Pregnant?

Yes, temporarily.

Viable sperm can remain within the reproductive tract after the testicles have been removed. Different postoperative guidelines advise separation from mares for periods ranging from several weeks to approximately six weeks. (MSU Veterinary Medicine)

A conservative practical rule is:

Keep a newly castrated horse completely separated from mares for six weeks unless the operating veterinarian provides a different evidence-based interval.

Separation should prevent actual physical access, not simply place the gelding on the opposite side of a weak fence.

How Do Vets Diagnose a Castration Complication?

The examination may include:

• Rectal temperature

• Heart rate

• Gum colour

• Hydration assessment

• Evaluation for blood loss

• Palpation of the scrotum and sheath

• Examination of the incisions

• Rectal palpation

• Ultrasound of the inguinal region

• Abdominal ultrasound

• Blood count and biochemistry

• Lactate measurement

• Packed cell volume and total protein

• Bacterial culture

• Abdominal-fluid analysis

• Hormonal testing for retained testicular tissue

A photograph or video may help with initial triage, but it cannot safely identify everything protruding from a wound or determine how far an infection extends.

What Should You Do Before Castration?

Confirm That Both Testicles Are Present

The veterinarian should confirm whether both testicles are descended.

A horse with one absent testicle may be cryptorchid and needs a different surgical plan. Removing only the descended testicle leaves the retained testicle producing testosterone.

Check Tetanus Protection

Confirm the horse’s tetanus vaccination history before the procedure.

Discuss Individual Risk

Tell the veterinarian about:

• The horse’s age

• Breed

• Weight

• Previous breeding use

• Previous inguinal or scrotal swelling

• Suspected hernia

• Previous surgery

• Bleeding disorders

• Current medications

• Illness or fever

• Behaviour and handling concerns

Older or larger stallions, horses with large inguinal rings and cryptorchid horses may be better managed with ligatures, a closed technique or hospital surgery.

Choose an Appropriate Location

Field castration requires:

• A clean, reasonably dry area

• Safe footing

• Adequate room

• Good lighting

• Safe anaesthetic recovery space

• Protection from severe weather

• A way to monitor the horse afterwards

Cooler weather can make fly control easier, but season alone does not determine safety. Clean technique, appropriate fly control and reliable monitoring matter more than chasing a particular month on the calendar.

Prepare for an Emergency

Know:

• How to reach the veterinarian

• Where the nearest equine surgical hospital is

• Whether the trailer is ready

• Who can transport the horse

• What the financial and insurance arrangements are

What To Do After Routine Open Castration

Always follow the operating veterinarian’s instructions because the aftercare changes with surgical technique.

The First 24 Hours

For many routine castrations:

• Keep the horse quiet in a stall or small paddock

• Avoid running, rough turnout and fence-line pacing

• Check for bleeding frequently during the first several hours

• Monitor gum colour and behaviour

• Confirm normal urination

• Offer food only once the horse is fully awake and swallowing normally

• Administer prescribed pain relief

• Keep the wound clean without scrubbing it

Michigan State University recommends confinement for up to 24 hours after routine castration to allow adequate clot formation. (MSU Veterinary Medicine)

From the Following Day

For a routine open castration, controlled exercise is often started the day after surgery to encourage drainage and limit swelling.

A common protocol involves:

• Fifteen to twenty minutes of controlled movement

• Once or twice daily

• Brisk walking or trotting as directed

• Continuing for approximately ten to fourteen days

Michigan State University recommends 15 to 20 minutes of trotting twice daily beginning the day after routine castration and continuing for two weeks or until the site heals. (MSU Veterinary Medicine)

This is not ridden training or unrestricted galloping.

The aim is steady movement that supports drainage without creating trauma.

Important Exception

Do not start this exercise protocol automatically after:

• Primary wound closure

• Inguinal surgery

• Laparoscopic cryptorchidectomy

• Abdominal surgery

• Severe haemorrhage

• Hernia repair

• Another procedure requiring strict rest

The surgeon’s instructions override generic open-castration advice.

How Should You Monitor the Wound?

Inspect the horse at least twice daily.

Record:

• Appetite

• Attitude

• Rectal temperature

• Amount of swelling

• Character of drainage

• Urination

• Manure production

• Willingness to move

• Any colic behaviour

Take the temperature before exercise, because movement and warm weather can temporarily increase it.

A temperature approaching or exceeding 102°F or 38.9°C, particularly with depression, painful swelling or reduced appetite, warrants veterinary advice. Normal adult stallion temperature is generally below approximately 100.6°F or 38.1°C. (Merck Veterinary Manual)

Should You Cold-Hose the Area?

Cold-water therapy may help reduce swelling and keep the external area cleaner when the veterinarian recommends it.

Use:

• Low pressure

• Clean water

• An approach from the side

• Short, controlled sessions

Do not:

• Force a high-pressure stream into the wounds

• Scrub inside the incisions

• insert hose nozzles

• Apply caustic antiseptics

• Pack powders or ointments into the wound

The open wound needs drainage, not enthusiastic amateur plumbing.

What About Flies and Bedding?

Maintain fly control around the horse, but do not spray harsh repellents directly into the surgical incisions.

A clean, dry environment is ideal. Fine shavings, sawdust and dirty bedding can stick to fresh wounds. The best bedding choice depends on the facility and the veterinarian’s instructions.

Remove manure regularly and avoid muddy areas during the early recovery period.

Does Every Horse Need Antibiotics?

Not necessarily.

Antibiotic decisions depend on:

• Surgical technique

• Operating conditions

• Horse age and health

• Contamination

• Whether the wound is closed

• Presence of infection

• Complications requiring packing or repeat surgery

Do not begin leftover antibiotics without veterinary direction.

Antibiotics cannot replace adequate drainage, haemorrhage control or surgery for evisceration. They can also reduce the value of bacterial culture if given before a sample is collected.

Common Mistakes Owners Make

Assuming All Bleeding Is Normal

A slow drip may be expected. A stream, spurting blood or pooling is not.

Assuming All Swelling Is Infection

Some swelling is normal. Swelling becomes concerning when it is severe, painful, hot, rapidly increasing or accompanied by fever and depression.

Providing No Controlled Exercise

After routine open castration, movement helps maintain drainage and reduce oedema. Quiet turnout does not guarantee that the horse will move enough.

Providing Too Much Exercise Too Early

Running, rough group turnout and hard work can increase bleeding and trauma. The goal is controlled movement, not a fitness test.

Following Open-Castration Instructions After Closed Surgery

Primarily sutured and cryptorchid procedures may require much stricter rest.

Scrubbing or Probing the Incision

This can introduce contamination or injure deeper structures.

Pushing Protruding Tissue Back Inside

The tissue may be intestine. Keep the horse still, support it and call a veterinarian immediately.

Waiting for Fever Before Calling

Severe haemorrhage and evisceration do not require fever. A horse can also have a serious local infection before the temperature becomes markedly elevated.

Putting the Gelding With Mares Too Soon

Residual sperm can remain after castration. Behaviour and fertility do not disappear the moment the testicles are removed.

Assuming Continued Stallion Behaviour Means the Surgery Failed

Some behaviour is learned or persists despite low testosterone. Retained testicular tissue should be tested for when the pattern is strong or the surgical history is uncertain.

How Can Complications Be Reduced?

Risk reduction includes:

• A complete preoperative examination

• Confirmation that both testicles are present

• Appropriate tetanus protection

• Selection of the correct surgical technique

• An experienced equine veterinarian

• Properly maintained surgical instruments

• Careful haemostasis

• Clean operating conditions

• Appropriate analgesia

• Clear written aftercare instructions

• Close observation during the first hours

• Controlled movement when appropriate

• Rapid response to abnormal bleeding or swelling

• Keeping the horse away from mares during recovery

• Referral of high-risk or cryptorchid cases

The decision between standing and recumbent surgery, open and closed techniques, or field and hospital castration should be based on the individual horse rather than convenience alone.

Will My Horse Recover Normally?

Most horses recover fully and return to their previous work.

The outlook is generally excellent when:

• Bleeding is minimal

• The horse remains bright and eating

• Drainage continues appropriately

• Swelling remains manageable

• No infection develops

• The aftercare plan is followed

The prognosis remains good for many infections and scirrhous cords when they are diagnosed and treated properly.

The prognosis becomes more guarded when:

• Severe blood loss has occurred

• Bowel has been exposed or damaged

• Treatment of evisceration is delayed

• Peritonitis develops

• A deep infection extends into the abdomen

• The horse becomes septic

• Multiple complications occur together

The critical factor is often not which complication occurred, but how quickly it was recognised and treated.

FAQs About Horse Castration Complications

How much bleeding is normal after horse castration?

A slow, occasional drip during the first few hours can be normal. Blood that streams, spurts, pools beneath the horse or does not clearly slow requires immediate veterinary advice.

How much swelling is normal after castration?

Mild to moderate scrotal and sheath swelling is common, particularly during the first several days. Severe, painful, hot or rapidly increasing swelling, especially with fever or reduced appetite, is abnormal.

When should exercise begin after castration?

Controlled exercise often begins approximately 24 hours after routine open castration. Primarily closed, inguinal and cryptorchid procedures may require different restrictions, so follow the operating veterinarian’s instructions.

How long should a newly castrated horse stay away from mares?

A conservative interval is six weeks because viable sperm and stallion-like behaviour can temporarily persist. Use secure physical separation.

Why is my gelding still behaving like a stallion?

Testosterone effects and learned behaviour may persist after castration. Some geldings continue showing stallion-like behaviour long term. Strong persistent behaviour should be investigated for retained testicular tissue, particularly when the surgical history is uncertain.

Final Thoughts

Castration is common, but it is still surgery.

Mild swelling, stiffness and a small amount of drainage can be part of normal healing after an open castration. The signs that should never be ignored are:

• Streaming or spurting blood

• Tissue hanging from the wound

• Severe or rapidly increasing swelling

• Fever

• Pus or foul discharge

• Colic

• Depression

• Reduced appetite

• Weakness or collapse

The first few hours matter most for haemorrhage and evisceration. The following several days matter most for swelling, poor drainage and infection. Chronic draining wounds or masses can appear weeks, months or even years later.

Know which operation your horse had, follow the specific rehabilitation plan and call early when something does not look right.

A routine gelding procedure should produce a comfortable, healing horse, not a test of how long everyone can wait before admitting the swelling has become ridiculous.

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If you are unsure whether postoperative bleeding, swelling or drainage is normal, ASK A VET™ can help you organise the signs and determine how urgently your local equine veterinarian needs to examine the horse.