What Should Small Mammals Eat? A Species-by-Species Feeding Guide

By Dr Duncan Houston

“Small mammal food” is a retail category, not a nutritional diagnosis.

Rabbits, guinea pigs and chinchillas are fibre-dependent herbivores. Rats, mice, hamsters and gerbils are omnivorous rodents. Ferrets are obligate carnivores. Hedgehogs are insectivore-leaning omnivores. Feeding all of them from the same bag can result in obesity, vitamin deficiency, dental disease, gastrointestinal dysfunction or serious nutritional imbalance.

The safest diet is therefore not the one with the cutest picture on the bag. It is the one formulated for the correct species, fed in the right quantity and supported by the foods that animal is biologically designed to eat.

Quick Answer

Rabbits, guinea pigs and chinchillas need unlimited grass hay with a measured species-appropriate pellet ration. Guinea pigs also require a dependable daily source of vitamin C.

Rats, mice, hamsters and gerbils should receive a complete, uniform pelleted or extruded rodent diet, with seeds, nuts and fruit restricted to small treats. Ferrets need a meat-based, high-protein, low-fibre diet, while hedgehogs should receive a measured complete hedgehog or insectivore food with limited supplemental insects and other appropriate extras. (Merck Veterinary Manual)

Small-Mammal Diets at a Glance

Species	Dietary type	Main foods	Common mistake
Rabbit	Fibre-dependent herbivore	Unlimited grass hay, leafy vegetables, measured plain pellets	Too many pellets and too little hay
Guinea pig	Fibre-dependent herbivore	Unlimited grass hay, vegetables, guinea pig pellets, daily vitamin C	Relying on old pellets or vitamin C water drops
Chinchilla	Dry-climate herbivore	Unlimited grass hay, measured chinchilla pellets, carefully introduced fresh foods	Nuts, seeds, dried fruit and excessive treats
Rat and mouse	Omnivorous rodent	Complete uniform rodent blocks with limited vegetables and fruit	Free-choice high-calorie food and seed picking
Hamster	Omnivorous rodent	Complete hamster pellets or extruded food with small fresh extras	Using a colourful seed mix as the entire diet
Gerbil	Omnivorous rodent	Complete gerbil pellets, limited extras	Sunflower seed-heavy mixtures
Ferret	Obligate carnivore	Complete meat-based ferret food	Fruit, vegetables, sweets or high-fibre foods
Hedgehog	Insectivore-leaning omnivore	Complete hedgehog or insectivore diet with measured insects and extras	Unlimited mealworms or calorie-dense cat food

The table is a starting framework. Age, body weight, pregnancy, illness, dental disease and the energy density of the chosen food all affect the final quantity. (Merck Veterinary Manual)

Why One Diet Does Not Work for Every Small Mammal

These animals differ in several clinically important ways.

Their Digestive Systems Are Different

Rabbits, guinea pigs and chinchillas ferment fibrous plant material within an enlarged caecum and colon. Long-strand fibre supports gastrointestinal movement, normal fermentation and prolonged chewing.

Ferrets have a short gastrointestinal tract designed primarily for animal-based protein and fat. They have limited ability to use fibre and large quantities of carbohydrate.

Rats, mice, hamsters and gerbils are more flexible omnivores, but flexibility does not mean they thrive on unrestricted sunflower seeds, fruit or table scraps. (Merck Veterinary Manual)

Their Teeth Are Different

All rabbit, guinea pig and chinchilla teeth grow continuously. Hay promotes the prolonged side-to-side chewing needed for cheek-tooth wear.

Rats, mice, hamsters and gerbils have continuously growing incisors, but their cheek teeth do not grow continuously in the same way. Ferrets have ordinary carnivore teeth and do not require hay or wooden blocks to “wear them down.”

Chew toys are useful enrichment. They are not a substitute for the correct staple diet or professional dental assessment. (Merck Veterinary Manual)

Their Essential Nutrients Are Different

Guinea pigs cannot manufacture vitamin C and need a reliable daily dietary source.

Ferrets require highly digestible animal protein and relatively little fibre. A rabbit food, guinea pig food or general seed mixture cannot meet those needs.

This is why swapping foods between species simply because the pellets look similar is risky. Brown cylinders are not all nutritionally equal. (Merck Veterinary Manual)

What Should Rabbits Eat?

An adult rabbit’s diet should be built around unlimited grass hay.

Suitable hay includes:

• Timothy hay

• Orchard grass

• Meadow hay

• Oat hay

• Other clean grass hays

Hay should remain available throughout the day and night. It provides structural fibre, encourages natural foraging and supports the prolonged chewing required for dental wear. (Merck Veterinary Manual)

Rabbit Pellets

Choose a plain, uniform, grass-hay-based rabbit pellet.

A general adult reference is approximately ¼ cup per 5 lb or 2.3 kg of body weight daily, but the correct amount varies according to the product, body condition, activity and medical history. An overweight rabbit may require less, while a growing, pregnant or lactating rabbit has different nutritional needs. (Merck Veterinary Manual)

Avoid free-choice pellets in most adult companion rabbits. Large pellet meals are consumed quickly and may reduce hay intake.

Vegetables for Rabbits

Offer a varied selection of appropriate leafy vegetables. Introduce new foods gradually and monitor stool quality.

Suitable choices may include:

• Romaine lettuce

• Coriander

• Basil

• Mint

• Rocket

• Bok choy

• Dandelion greens

• Selected leafy tops and herbs

Fruit and sweet root vegetables should remain occasional treats rather than routine dietary staples.

Young, Pregnant and Lactating Rabbits

Growing rabbits and reproductively active females may benefit from higher-energy pellets and alfalfa-based foods. Those foods are generally too calorie- and calcium-dense for routine feeding to healthy adult maintenance rabbits. (Merck Veterinary Manual)

Rabbit Foods To Avoid

Avoid routine feeding of:

• Muesli-style mixes

• Breakfast cereal

• Bread

• Biscuits

• Seed sticks

• Yoghurt drops

• Large amounts of fruit

• Large bowls of pellets

• Dog or cat food

Controlled research found that rabbits offered muesli selectively consumed preferred components, ate less hay and developed less favourable feeding and dental patterns than rabbits receiving uniform nuggets with hay. (PubMed)

What Should Guinea Pigs Eat?

Guinea pigs require unlimited grass hay, fresh vegetables, a measured guinea pig pellet and a dependable daily source of vitamin C.

Hay for Guinea Pigs

Grass hay should remain available at all times.

Hay supports:

• Gastrointestinal movement

• Normal caecal fermentation

• Cheek-tooth wear

• Foraging behaviour

• Healthy body condition

Alfalfa may be useful for growing, pregnant or lactating guinea pigs, but it is not usually the ideal routine hay for healthy adults.

Guinea Pig Pellets

Choose fresh, plain pellets formulated specifically for guinea pigs.

Do not use rabbit pellets as the sole commercial food. Rabbit food may look almost identical but is not required to contain enough vitamin C for guinea pigs.

Buy smaller bags, check the dates and store the food in a cool, dry and dark location. Vitamin C degrades with heat, light, moisture and prolonged storage. (Merck Veterinary Manual)

How Much Vitamin C Do Guinea Pigs Need?

Current veterinary guidance uses approximately:

• Healthy adults: 10 to 25 mg/kg daily

• Growing, pregnant, lactating or ill guinea pigs: around 30 mg/kg daily or more, depending on veterinary advice

Useful food sources include:

• Red or green bell pepper

• Kale

• Parsley

• Tomatoes

• Beet greens

• Other suitable vitamin C-rich vegetables

Do not rely on vitamin C drops added to drinking water. The vitamin degrades, intake cannot be measured accurately and the altered flavour may reduce water consumption. (Merck Veterinary Manual)

Foods To Avoid or Restrict

Avoid:

• Rabbit food as the only pellet

• Muesli or seed mixes

• Vitamin C water additives

• Large fruit portions

• Sugary treats

• Sudden dietary changes

• Excessive supplementation without calculating total intake

A measured oral vitamin C product may be useful when pellet freshness or vegetable intake is uncertain.

What Should Chinchillas Eat?

Chinchillas are adapted to a dry, high-fibre plant diet.

Their dietary foundation should be:

• Unlimited fresh grass hay

• A small measured portion of plain chinchilla pellets

• Fresh clean water

Merck provides 1 to 2 tablespoons of pellets per adult per day as a general reference, although body weight, body condition and the product’s calorie density still matter. (Merck Veterinary Manual)

Fresh Foods for Chinchillas

Some healthy chinchillas tolerate small amounts of fresh leafy vegetables, but these should be introduced slowly, one item at a time.

Possible choices include small amounts of:

• Romaine lettuce

• Green leaf lettuce

• Bell pepper

• Celery

• Carrot tops

The first sign that a new food is not being tolerated may be softer, sticky or unusually shaped droppings.

Hay and plain pellets should remain the nutritional foundation. Fresh produce should not become a large salad bowl.

Chinchilla Treats

Avoid or heavily restrict:

• Dried fruit

• Raisins

• Nuts

• Seeds

• Grain treats

• Sweetened sticks

• Large fruit portions

• Yoghurt drops

These foods are energy-dense and may disrupt the gastrointestinal tract. Fruit is optional, not nutritionally necessary, and should be tiny and infrequent when used at all. (Merck Veterinary Manual)

Why Hay Matters So Much

Chinchilla cheek-tooth disease is common and may become advanced before the animal stops eating. Long-strand hay encourages prolonged chewing, but even an excellent diet cannot prevent every genetic or anatomical dental disorder. (Merck Veterinary Manual)

Drooling, reduced hay intake, smaller droppings, eye discharge or gradual weight loss needs veterinary investigation, not merely a new chew toy.

What Should Rats and Mice Eat?

Rats and mice should receive a nutritionally complete, uniform rodent block or pellet as the dietary foundation.

Uniform diets reduce selective eating. A seed mixture allows the animal to choose high-fat preferred ingredients while leaving the fortified components behind.

Rat and Mouse Diet Structure

Use:

• A complete rat- or mouse-specific block

• Measured portions based on the food label and body condition

• Small amounts of suitable vegetables

• Limited fruit

• Occasional seeds or nuts as treats

Suitable fresh foods may include small portions of:

• Leafy vegetables

• Bell pepper

• Broccoli

• Courgette

• Cucumber

• Carrot

• Small fruit pieces

Remove moist food before it spoils.

Why Portions Matter

Laboratory-style rodent chows can be relatively high in calories. When they are offered without restriction, pet rats and mice may become obese. Calorie control without nutrient restriction is associated with better health and longevity in these species. (Merck Veterinary Manual)

Monitor body condition rather than waiting until the rat has achieved the general shape of a beanbag.

Foods To Restrict

Restrict:

• Sunflower seeds

• Peanuts

• Large amounts of nuts

• High-fat seed mixes

• Sweetened cereals

• Chocolate

• Alcohol

• Highly salted or seasoned foods

• Large amounts of fruit

• Spoiled fresh foods

Seeds and nuts work better as occasional training rewards than as the contents of a permanently full bowl.

What Should Hamsters Eat?

Hamsters are omnivorous rodents, but a complete hamster diet should still form the majority of their food.

Choose a plain, balanced pelleted or extruded diet formulated for the species. Generic seed mixes should not be used as the sole diet because hamsters selectively consume preferred seeds and leave less palatable fortified components. (Merck Veterinary Manual)

Hamster Fresh Foods

Small amounts of suitable fresh food may include:

• Leafy greens

• Bell pepper

• Cucumber

• Broccoli

• Courgette

• Small amounts of cooked egg or another appropriate protein food

• Tiny portions of fruit for species in which sugar restriction is not medically required

Fresh foods and treats should generally remain below approximately 10% of the total diet. (Merck Veterinary Manual)

Remember That Hamsters Hoard

Food disappearing from the bowl does not necessarily mean it has been eaten.

Check food stores regularly and remove:

• Mouldy pellets

• Spoiled vegetables

• Wet food

• Large hidden piles of calorie-dense seeds

Do not destroy the entire food store every day unless it has become contaminated. Hoarding is normal behaviour, but rotting cucumber behind a hide is not enrichment.

What Should Gerbils Eat?

Gerbils should receive a complete pelleted diet formulated for gerbils or hamsters and gerbils.

Merck recommends diets containing approximately 18% to 20% protein, with around 5 to 8 g per adult daily as a general reference. Individual requirements vary with body size, activity and life stage. (Merck Veterinary Manual)

Avoid Seed-Based Selective Feeding

Sunflower seed-heavy mixtures are:

• High in fat

• Low in calcium

• Easy to overeat

• Nutritionally incomplete when preferred ingredients are selected

Use seeds sparingly as enrichment or training rewards.

Small amounts of suitable vegetables and other fresh foods can be offered, but the complete pellet should remain the nutritional base.

What Should Ferrets Eat?

Ferrets are obligate carnivores.

Their diet should be meat-based, energy-dense, highly digestible and relatively low in carbohydrate and fibre.

Professional guidance commonly recommends approximately:

• Protein: 35% to 40%

• Fibre: below about 2.5%

• Carbohydrate: relatively low, commonly below 25%

• Fat: sufficient to meet the ferret’s high energy requirements

Choose a complete commercial ferret food with animal-based protein prominent in the formulation. (Merck Veterinary Manual)

Ferret Foods To Avoid

Do not routinely feed:

• Fruit

• Vegetables

• Bread

• Breakfast cereal

• Biscuits

• Sweets

• Dairy products

• Dog food

• High-fibre foods

• Sugary pastes

• Large amounts of plant protein

The original suggestion of allowing a teaspoon of fruit or vegetables each day is not appropriate. Ferrets do not need produce as a routine dietary component.

Use small meat-based treats instead.

Can Ferrets Eat Cat Food?

A high-quality kitten food may sometimes be used when a suitable ferret diet is unavailable, but a properly formulated ferret food is generally preferable.

Do not assume that every cat food is suitable. Adult weight-control cat foods may be too low in fat, and some formulas contain excessive fibre or carbohydrate. (Merck Veterinary Manual)

What About Raw or Whole-Prey Feeding?

A carefully formulated whole-prey diet can provide appropriate animal tissues. A bowl of supermarket mince cannot.

Unbalanced meat-only diets may lack:

• Calcium

• Appropriate calcium-to-phosphorus balance

• Vitamins

• Trace minerals

• Essential fatty acids

• Other required nutrients

Raw pet foods also carry a greater risk of contamination with organisms including Salmonella and Listeria monocytogenes. Raw feeding does not become sterile simply because the animal has a short digestive tract. (fda.gov)

Any homemade raw plan should be reviewed by a veterinarian with exotic-animal nutrition experience, with strict household food hygiene.

What Should Hedgehogs Eat?

The preferred foundation is a complete commercial hedgehog or insectivore food.

When a suitable product is unavailable, a carefully selected weight-management cat or dog food may sometimes be used as an alternative, but calorie intake and nutrient composition need review.

Merck gives approximately 3 to 4 teaspoons or 15 to 20 mL of the staple diet daily as a typical starting quantity, adjusted according to weight, activity and body condition. (Merck Veterinary Manual)

Hedgehog Extras

Small measured extras may include:

• Gut-loaded crickets

• Mealworms in limited quantities

• Other cultured invertebrates

• Cooked egg

• Small amounts of cooked unseasoned meat

• Suitable moist commercial food

• Tiny portions of selected vegetables or fruit

Insects provide valuable hunting enrichment, but fatty larvae should not be supplied without limit.

Hedgehog Foods To Avoid

Avoid:

• Raw meat

• Raw egg

• Milk

• Sugary food

• Unlimited mealworms or waxworms

• Large quantities of fruit

• Unbalanced home-prepared meat diets

• Free-choice calorie-dense cat food in an overweight hedgehog

Raw meat and eggs introduce avoidable pathogen risks, while milk commonly causes diarrhoea. (Merck Veterinary Manual)

How Should You Choose a Commercial Small-Mammal Food?

Choose the Correct Species

The bag should identify the animal it is intended to feed.

Do not assume the following are interchangeable:

• Rabbit and guinea pig pellets

• Guinea pig and chinchilla pellets

• Rat blocks and hamster seed mixes

• Cat food and ferret food

• Cat food and hedgehog food

Prefer Uniform Foods

For most rodents and herbivores, plain uniform pellets or blocks are preferable to colourful mixtures.

Uniform food reduces selective eating and makes nutrient intake more predictable.

Read the Ingredient List

Look for the dietary pattern appropriate for the animal:

• Rabbits and guinea pigs: grass-hay-based, high-fibre pellets

• Chinchillas: plain high-fibre chinchilla pellets

• Rats and mice: complete fortified rodent blocks

• Hamsters and gerbils: complete pellets or extruded food

• Ferrets: animal-based protein and low fibre

• Hedgehogs: complete insectivore or hedgehog formulation

Check Dates and Storage

Keep dry food:

• In its original bag where practical

• Sealed against air and moisture

• In a cool, dry location

• Away from sunlight and heaters

• Within the manufacturer’s recommended use-after-opening period

Heat and moisture can degrade nutrients and encourage mould. Vitamin C-containing guinea pig food deserves particular attention. (Merck Veterinary Manual)

Can Food Be Used as Enrichment?

Yes, but enrichment should reorganise the daily ration rather than quietly doubling it.

For Rabbits, Guinea Pigs and Chinchillas

Try:

• Hay in several locations

• Hay-stuffed cardboard tubes

• Forage mixed through hay

• Small pieces of vegetables hidden in paper parcels

• Scatter-feeding measured pellets

• Different safe grass hays

For Rats, Mice, Hamsters and Gerbils

Try:

• Scatter-feeding part of the pellet ration

• Paper parcels

• Cardboard tubes

• Small food puzzles

• Hiding blocks within deep bedding

• Tiny seeds used for training

Remember that hamsters and gerbils may carry food away and store it.

For Ferrets

Use:

• Food puzzles suitable for carnivores

• Pieces of the normal kibble ration hidden in tunnels

• Meat-based training treats

• Supervised whole-prey-style enrichment when appropriate

Do not use fruit or cereal treats merely because they fit inside a puzzle.

For Hedgehogs

Allow supervised hunting for appropriately sized cultured insects and scatter part of the normal dry ration through a clean foraging area.

The calorie still counts, even when the pet had to solve a cardboard puzzle to obtain it.

How Should Diet Changes Be Made?

Change diets gradually unless an immediate medical reason requires otherwise.

A typical transition may take seven to fourteen days:

1. Begin with mostly the familiar food.

2. Add a small proportion of the new food.

3. Increase the new food every few days.

4. Monitor appetite, body weight and droppings.

5. Slow the transition if stool quality changes.

6. Seek veterinary advice if the animal stops eating.

Ferrets may become strongly attached to foods learned early in life, while herbivores can develop serious gastrointestinal complications after abrupt food refusal.

Do not introduce several new foods, supplements and treats simultaneously. That turns a simple diet transition into a nutritional detective novel with all the clues eaten.

How Worried Should You Be About a Feeding Change?

Lower Risk

The animal:

• Refuses one unfamiliar food

• Continues eating the normal staple diet

• Maintains normal activity

• Produces normal droppings

• Maintains a stable body weight

Action: Remove the refused food and try a slower introduction later.

Moderate Concern

The animal:

• Eats less of the staple diet

• Produces smaller or softer droppings

• Has mild weight loss

• Is becoming selective

• Drinks noticeably more or less

• Shows a persistent change for several hours

Action: Contact an exotics veterinarian the same day if the change continues, particularly in a rabbit, guinea pig, chinchilla or degu.

High Concern

The animal has:

• Complete food refusal

• Markedly reduced or absent droppings

• Repeated diarrhoea

• Drooling

• Difficulty chewing

• Rapid weight loss

• A swollen abdomen

• Repeated vomiting in a species capable of vomiting

• Marked lethargy or weakness

Action: Seek urgent veterinary care.

Critical

The animal has:

• Collapse

• Minimal responsiveness

• Open-mouth or laboured breathing

• Severe abdominal distension

• Repeated vomiting with little or no stool

• Active bleeding

• Black tar-like stool

• Inability to stand

• Severe dehydration

• Food or liquid coming from the nose

• Suspected gastrointestinal obstruction

Action: Attend an emergency exotic veterinary service immediately.

What Else Can Cause Reduced Eating?

A feeding problem is not always caused by the food.

Possible cause	Important clues
Dental disease	Drooling, food dropping, preference for soft food, facial swelling
GI stasis or ileus	Reduced appetite, smaller droppings, abdominal pain, lethargy
Foreign-body obstruction	Sudden anorexia, vomiting in ferrets or rodents, little stool, painful abdomen
Urinary disease	Straining, blood in urine, wet fur, abdominal discomfort
Respiratory disease	Noisy breathing, discharge, increased effort, inability to smell food
Pain or injury	Reluctance to move, hunched posture, aggression when touched
Heat stress	Weakness, rapid breathing, reduced appetite, collapse
Infection or parasites	Diarrhoea, weight loss, fever, several animals affected
Cancer or organ disease	Progressive weight loss, masses, weakness, chronic appetite reduction
Spoiled or changed food	Several animals refuse a newly opened bag or develop similar signs

Dental disease should move high on the list whenever a rabbit, guinea pig or chinchilla stops eating hay but still accepts softer food. Vomiting and reduced stool in a ferret should raise immediate concern for a foreign body. (Merck Veterinary Manual)

When Is This an Emergency?

Seek immediate veterinary care when a small mammal develops:

• Complete food refusal

• Markedly reduced or absent droppings

• Severe abdominal swelling

• Repeated vomiting

• Drooling with inability to chew or swallow

• Rapid weight loss

• Collapse

• Severe weakness

• Open-mouth breathing

• Pale, grey or blue tissues

• Bloody or black faeces

• Significant diarrhoea with lethargy

• Suspected ingestion of rubber, foam, fabric or another foreign object

• Rapid deterioration over several hours

Do not wait until the next day when a rabbit, guinea pig or chinchilla has stopped eating and stool production is falling. Fibre-dependent herbivores can enter a dangerous cycle of pain, dehydration and gastrointestinal hypomotility.

A vomiting ferret with little or no stool should not be force-fed until an obstruction has been investigated.

What To Do Right Now if Your Small Mammal Is Not Eating

1. Contact an Exotics Veterinarian

Tell the clinic:

• Species

• Age

• Current weight

• When normal eating stopped

• Which foods are being refused

• Dropping or stool changes

• Vomiting or diarrhoea

• Current diet and supplements

• Recent diet changes

• Possible access to foreign material

• Other animals affected

2. Keep Familiar Food Available

Offer the normal staple diet, hay where appropriate and fresh water.

Do not respond to food refusal by creating a buffet of fruit, sweets and unfamiliar treats.

3. Check the Water System

Confirm that:

• The bottle is flowing

• The bowl is clean

• Water is accessible

• A dominant companion is not blocking access

4. Weigh the Animal

Use an accurate digital scale.

During illness, daily weight measurements are far more useful than deciding the pet “still feels about the same.”

5. Photograph the Droppings

Bring a fresh sample where practical and record:

• Size

• Shape

• Colour

• Consistency

• Presence of blood or mucus

• Quantity

6. Do Not Force-Feed an Unstable Animal

Do not syringe-feed an animal that:

• Is severely bloated

• Is repeatedly vomiting

• Cannot swallow

• Has food coming from the nose

• Is struggling to breathe

• Is minimally responsive

• May have an obstruction

Assisted feeding is extremely valuable in the correct patient. In the wrong patient, it can worsen distension or cause aspiration.

7. Do Not Give Human Medication

Avoid human painkillers, antidiarrhoeals, laxatives, vitamins and leftover antibiotics.

Common Small-Mammal Feeding Mistakes

Feeding One Generic Mix to Several Species

A product suitable for a rat is not suitable for a rabbit, and neither is suitable for a ferret.

Providing Too Many Pellets and Too Little Hay

Rabbits, guinea pigs and chinchillas may fill up on pellets and reduce the prolonged hay chewing their teeth and gastrointestinal systems require.

Using Seed Mixes as the Staple Diet

Rats, mice, hamsters and gerbils often select high-fat seeds and leave the fortified components.

Assuming Chew Toys Prevent Dental Disease

Wooden toys cannot correct cheek-tooth malocclusion, tooth-root elongation or jaw disease.

Giving Vitamin C in Guinea Pig Water

The dose is unreliable and may reduce drinking.

Feeding Ferrets Fruit or Vegetables

Ferrets do not need produce as a routine part of the diet.

Feeding Unbalanced Raw Meat

Muscle meat is not a complete carnivore diet, and raw products introduce pathogen risks.

Using Treats as Enrichment Without Counting Them

A seed hidden in a puzzle is still a seed. Twelve puzzles later, the hamster has completed both enrichment and a small buffet.

Waiting Too Long After Appetite Changes

Small mammals frequently hide illness. Reduced eating may be one of the earliest signs of pain, dental disease, obstruction or systemic illness.

How Can Nutrition Problems Be Prevented?

Feed for the Exact Species

Choose a diet designed for the animal you own, not simply for “small pets.”

Monitor Body Weight

Weigh healthy animals weekly. Weigh more frequently during diet changes, pregnancy, illness or recovery.

A consistent downward trend deserves investigation even when the animal still appears reasonably rounded.

Observe Eating Every Day

Confirm that each individual animal is eating.

In a group enclosure, an empty bowl proves that someone ate. It does not prove that everyone did.

Check Droppings and Stool

Changes in quantity, size or consistency frequently appear before severe illness becomes obvious.

Store Food Properly

Protect food from heat, humidity, light, insects and rodents. Discard damp, mouldy or rancid food.

Introduce New Foods Slowly

Add one new food at a time so reactions can be identified.

Use Enrichment Without Excess Calories

Scatter or hide part of the normal ration rather than constantly adding treats.

Arrange Routine Dental and Health Examinations

Diet reduces risk, but it does not prevent every dental, metabolic or gastrointestinal disorder.

Frequently Asked Questions

Can rabbits and guinea pigs eat the same pellets?

Not as their sole commercial diet. Guinea pigs require a dependable vitamin C source, while rabbit pellets are not required to contain enough vitamin C for them.

Should small mammals have food available all day?

Rabbits, guinea pigs and chinchillas should always have grass hay available. Feeding frequency for pellets, rodent blocks, ferret food and hedgehog diets depends on species, age, body condition and the product used.

Are seed mixes healthy for hamsters, rats and gerbils?

Seeds can be used as small treats, but mixed seed diets encourage selective eating and may be high in fat. A complete uniform pellet or block is a more reliable staple.

Can ferrets eat fruit and vegetables?

They should not be routine foods. Ferrets are obligate carnivores and need a meat-based diet that is high in digestible animal protein and low in fibre and carbohydrate.

Do chinchillas need fresh vegetables?

Some healthy chinchillas tolerate small amounts of selected leafy vegetables, introduced gradually. Unlimited grass hay and measured chinchilla pellets should remain the foundation.

How quickly should I call a vet when a small mammal stops eating?

Contact an exotics veterinarian the same day. Treat the situation as an emergency when food refusal is complete or accompanied by reduced droppings, bloating, vomiting, drooling, weakness, breathing difficulty or collapse.

Final Thoughts

Small mammals do not share one universal nutritional plan.

The most important principles are:

1. Rabbits, guinea pigs and chinchillas need unlimited grass hay.

2. Guinea pigs need a dependable daily source of vitamin C.

3. Rats, mice, hamsters and gerbils do best with a complete uniform diet rather than selective seed mixes.

4. Ferrets are obligate carnivores and should not be fed fruit and vegetables routinely.

5. Hedgehogs need a measured complete insectivore-style diet, not unlimited fatty insects.

6. Pellets and blocks should be portioned according to species, product and body condition.

7. Fresh foods should be introduced gradually.

8. Treats should not displace the staple diet.

9. Raw diets are neither automatically complete nor free from infectious risk.

10. Reduced food intake may indicate dental disease, pain, obstruction or systemic illness.

11. Weekly weight records identify problems early.

12. Complete food refusal, severe bloating, vomiting, collapse or breathing difficulty requires urgent care.

The safest feeding plan starts by asking what the species is biologically designed to eat, then adjusting for the individual animal’s age, weight and health. The food may be small. The nutritional consequences are not.

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ASK A VET™ can help you review food labels, daily portions, body-weight trends, vitamin supplementation and changes in appetite or droppings while you arrange care with an exotics veterinarian. A small mammal with complete food refusal, severe abdominal swelling, repeated vomiting, collapse or breathing difficulty still requires immediate hands-on veterinary treatment.