Downer Cows: How to Assess, Stabilize, and Decide What to Do Next

By Dr Duncan Houston

A downer cow is one of the most urgent situations you will face on farm. The longer a cow remains down, the worse the outcome becomes. Muscle damage, nerve compression, dehydration, and shock all progress quickly, which means early decisions matter more than anything else.

The critical question is not just “why is she down?” It is “can she get back up, and what should we do right now?”

This guide explains how to assess a downer cow, how to respond immediately, when treatment is appropriate, and when euthanasia is the most humane option.

Quick Answer

A downer cow is unable to stand and requires immediate assessment. Common causes include milk fever, grass tetany, injury, or severe disease. Stabilise the cow quickly with safe footing, water, and pain relief, and involve a veterinarian early. If the cow is alert, responsive, and has a treatable condition, intervention may succeed. If she is severely injured, unresponsive, or deteriorating, euthanasia may be the most humane decision.

What Is a Downer Cow?

A downer cow is a cow that cannot stand or rise on her own.

This can be:

• Sudden onset

• Gradual decline

• Associated with calving or early lactation

• Linked to metabolic, infectious, or traumatic causes

Clinical Insight

Not all downer cows are the same. Some are fully treatable if acted on early. Others have irreversible damage. The challenge is identifying which is which as quickly as possible.

The Most Common Causes

Metabolic Causes

Milk fever (hypocalcemia)

• Common around calving

• Causes weakness and inability to stand

Grass tetany (hypomagnesemia)

• Often rapid onset

• Can include muscle tremors or collapse

Trauma and Injury

• Fractures

• Muscle damage

• Calving-related injury

• Slipping or poor footing

Neurological Causes

• Nerve damage from calving

• Spinal injury

• Toxic or metabolic effects

Systemic Disease

• Severe infection

• Toxemia

• Advanced illness

Decision Checkpoint

If the cause is metabolic and caught early, recovery can be rapid. If the cause is traumatic or prolonged recumbency, prognosis drops significantly.

Why Time Matters So Much

Once a cow is down:

• Blood flow to muscles is reduced

• Nerve compression begins

• Muscle damage develops

• The ability to stand declines further

Clinical Insight

A cow that has been down for hours has a very different prognosis than one down for a day. A cow down for days has a very poor prognosis in most cases.

Immediate Response: What to Do First

1. Ensure Safety

Handling a downer cow is a team task.

• Use at least two to three people

• Avoid rushing or panicking

• Keep the environment calm

2. Perform a Rapid Assessment

Check:

• Alertness and responsiveness

• Ability to lift the head

• Limb position and movement

• Breathing rate and effort

• Signs of pain or distress

Decision Checkpoint

If the cow is alert, trying to rise, and responsive, prognosis is better. If she is flat, unresponsive, or in severe distress, prognosis is poor.

3. Move to a Safe Surface

If safe to do so:

• Move to dry, soft ground

• Provide good footing

• Avoid dragging on hard surfaces where possible

Poor footing worsens injury and reduces the chance of standing.

4. Provide Immediate Support

• Offer fresh water

• Protect from weather exposure

• Reduce stress

5. Pain Relief

Pain management is essential.

Common approach:

• NSAIDs such as flunixin meglumine

Avoid:

• Corticosteroids in certain situations, particularly in late pregnancy, due to risks such as abortion

Clinical Insight

Pain reduces the cow’s willingness to attempt standing. Managing pain improves recovery chances.

When to Call the Veterinarian

Early veterinary involvement is critical.

Call immediately if:

• The cause is unclear

• The cow cannot attempt to rise

• There are signs of severe illness or injury

• The cow does not improve quickly

What the Vet Will Assess

• Blood calcium and magnesium levels

• Hydration status

• Evidence of trauma

• Neurological function

• Overall prognosis

Treatment Based on Cause

Milk Fever

• Intravenous calcium

• Often rapid improvement if treated early

Grass Tetany

• Magnesium supplementation

• Urgent correction required

Injury

• Depends on severity

• May include lifting support or pain management

• Some cases are not recoverable

Systemic Disease

• Supportive care

• Fluids

• Targeted treatment

Decision Checkpoint

If the cow does not respond to initial treatment within a short timeframe, reassessment is needed quickly.

Lifting and Support: When and How

Some cows may benefit from assisted standing.

Options include:

• Hip lifters

• Slings

• Controlled lifting systems

Important Considerations

• Do not leave cows suspended for prolonged periods

• Monitor closely

• Ensure footing is stable

Clinical Insight

Lifting can help, but it is not a cure. If the underlying problem is not resolved, lifting alone will not fix the issue.

When Is Euthanasia the Right Decision?

This is one of the hardest but most important decisions.

Consider euthanasia if:

• The cow is unresponsive

• There is severe injury or fracture

• There is no improvement after treatment

• The cow has been down for an extended period

• Pain cannot be controlled

• Recovery is unlikely

Decision Checkpoint

If welfare is compromised and recovery is unlikely, euthanasia is the most humane option.

Severity Framework: How Urgent Is the Situation?

Mild

• Recently down

• Alert

• Attempting to rise

Immediate intervention likely to succeed.

Moderate

• Unable to stand

• Still responsive

• Some movement

Requires prompt treatment and monitoring.

High Risk

• Weak

• Minimal movement

• Signs of systemic illness

Urgent veterinary involvement required.

Critical

• Unresponsive

• Severe injury

• Prolonged recumbency

Emergency decision required.

What Should You Do Right Now?

If a cow goes down:

1. Assess alertness and movement

2. Identify likely cause if possible

3. Move to safe footing

4. Provide water and protection

5. Administer pain relief where appropriate

6. Call your veterinarian

7. Monitor closely over the next hours

Time-Based Guidance

• First hour: assess and stabilise

• First few hours: initiate treatment

• Within 12 hours: reassess response

• Beyond 24 hours down: prognosis declines significantly

Common Mistakes With Downer Cows

• Waiting too long to act

• Failing to assess cause early

• Leaving cows on hard or wet surfaces

• Not providing pain relief

• Over-relying on lifting without diagnosis

• Delaying euthanasia when recovery is unlikely

How to Improve Outcomes

• Train staff to recognise early signs

• Act immediately when cows go down

• Maintain safe, non-slip environments

• Monitor high-risk periods such as calving

• Work closely with your veterinarian

Early action improves both welfare and outcomes.

FAQs

Can a downer cow recover?

Some can, especially if treated early and the cause is reversible.

How long can a cow stay down before prognosis worsens?

Prognosis declines significantly after 12 to 24 hours.

Should I try to lift every downer cow?

No. Lifting is useful in some cases but not all. The underlying cause must be addressed.

What is the most common cause around calving?

Milk fever is one of the most common and treatable causes.

When should I euthanise?

When recovery is unlikely and welfare is compromised.

Final Thoughts

Downer cows are time-critical cases.

The key factors are:

• rapid assessment

• early treatment

• correct diagnosis

• pain management

• timely decision-making

Most outcomes are determined in the first hours, not days.

The earlier you act, the better the chance of recovery.

If you want help assessing downer cow cases, deciding when to treat versus euthanise, or improving on-farm protocols, ASK A VET™ can support fast, practical decision-making when it matters most.