Chinchilla nutrition guide: hay, pellets, and why sugary treats kill
Chinchillas are among the most misunderstood pets when it comes to diet. Their soft fur, animated behaviour, and apparent vitality give the impression of a robust animal. The biological reality is the exact opposite: the chinchilla is a high-altitude Andean herbivore of extreme digestive fragility, and dietary mistakes that seem harmless (an apple slice, a handful of sunflower seeds, a coloured sugar stick) can trigger fatal gastrointestinal stasis within 48 hours.
This guide covers everything you need to feed your chinchilla correctly: Andean digestive biology, the role of timothy hay, pellet selection, what you must never give, and warning signs to watch for. There is no shortcut here - understanding the why before acting is the difference between a chinchilla that lives 10-12 years and one that dies at four from preventable digestive disease.
You can browse our general small animal rankings and our methodology page to understand how we score products. For other species, read our rabbit nutrition guide, our guinea pig nutrition guide, and our hamster nutrition guide.
The French version of this guide is available at /fr/blog/fr-alimentation-chinchilla-guide/.
The Andean chinchilla: a herbivore shaped by extreme dryness
Biology forged at altitude
The domestic chinchilla (Chinchilla lanigera) originates from the Andes mountain range in South America - primarily Chile, Bolivia, and Peru, at altitudes between 3,000 and 5,000 metres. Its natural habitat is characterised by dry, sparse vegetation composed mainly of grasses, dry herbs, lichens, and fibrous shrubs. The food available is low in sugar, low in fat, and high in woody fibre.
This geographical context is fundamental to understanding captive diet. The chinchilla's digestive system evolved over millennia to extract maximum energy from low-calorie fibrous substrates. A chinchilla exposed to foods rich in simple sugars (fruit, honey, dried vegetable pieces), fat (seeds, nuts), or refined starch (biscuits, breakfast cereals) faces ingredients that its enzymes simply cannot process adequately.
The chinchilla's intestine is long, delicate, and acutely sensitive to dietary change. Its caecum - the fermentation chamber representing a significant portion of its total digestive volume - houses a specialised bacterial flora adapted to breaking down plant fibre. Any disruption of this flora causes dysbiosis, abnormal fermentation, and in severe cases gastrointestinal stasis (GI stasis): the intestine stops functioning, gas accumulates, and the animal enters a medical emergency.
GI stasis: understanding the mechanism to prevent it
GI stasis is the leading cause of premature death in domestic chinchillas. It is rarely caused by infection or disease - it is almost always dietary in origin, triggered by insufficient long fibre, excess simple carbohydrates, or an abrupt dietary change.
Here is what happens mechanically: without a continuous supply of insoluble fibre of the kind found in timothy hay, the peristaltic contractions of the chinchilla's intestine gradually slow down. Anaerobic bacteria in the caecum - those that produce gas during fermentation - outcompete the beneficial fermentation bacteria. Gas accumulates in an increasingly immobile intestine. The chinchilla experiences abdominal pain that prevents it from eating, which further worsens the stasis. The animal dies if intestinal transit does not resume.
Symptoms of stasis: the chinchilla stops eating, remains still and hunched, refuses its regular pellets, produces very few droppings or droppings that are very small and misshapen, and the abdomen may feel distended and painful to the touch. This is a veterinary emergency. Exotic vets treat stasis with subcutaneous hydration, gut motility drugs (metoclopramide), and analgesia. The prognosis depends on how quickly treatment is started.
Stasis is prevented through diet: unlimited access to timothy hay, zero sugary treats, zero fruit, suitable pellets with no cereals or added sugars. For more on harmful ingredients in small animal foods, see our worst pet food ingredients guide.
Caecotrophy in the chinchilla
Like the rabbit (see our complete rabbit nutrition guide), the chinchilla practises caecotrophy: it produces two types of droppings - dry hard pellets and caecotropes (soft, shiny pellets produced mainly at night) - which it re-ingests directly from its anus. This re-ingestion allows it to recover proteins, essential amino acids, and B vitamins synthesised by the caecal bacteria.
If you find uneaten caecotropes in the cage, this is a warning sign: either the chinchilla is too overweight to reach its anus, or its diet is too rich in protein and calories and it no longer needs to re-ingest them. Either way, diet needs to be adjusted immediately.
Hay: 80 pourcent of the diet, fundamental and non-negotiable
Why hay is the foundation, not a supplement
The core rule for chinchillas is identical to that for rabbits: hay must represent at least 80 pourcent of daily food intake by volume, available on an unlimited, free-choice basis 24 hours a day. Not as a supplement. Not "if they want it". Hay is the foundation that everything else is built upon.
Here is exactly what hay does inside the chinchilla's body:
Maintaining intestinal transit. The long insoluble fibres in hay (lignin, cellulose) mechanically stimulate the peristaltic contractions of the intestine. Chewing hay is time-consuming and keeps the intestine working continuously. Without this permanent mechanical stimulus, transit slows - and stasis begins.
Correct dental wear. Chinchilla teeth, like rabbit teeth, grow continuously throughout life (approximately 2-3 mm per week). Chewing hay involves a lateral grinding motion, different from chewing pellets. This motion is the only one that correctly wears all tooth surfaces, including the lateral faces of the molars. A chinchilla that eats little hay develops dental malocclusions (spurs, enamel points) that ulcerate the tongue and cheeks, prevent chewing, and lead to anorexia. Severe malocclusions are often irreversible and require repeated dental burring under anaesthesia.
Caloric regulation. Hay is very low in calories (approximately 2 kcal/g dry matter) but high in volume. A chinchilla with free access to hay maintains its ideal weight without a tendency to overconsume. A chinchilla whose diet is primarily pellet-based (denser, at approximately 3.2 kcal/g) tends to gain weight, which in turn disrupts caecotrophy.
Which hay to choose for your chinchilla
Timothy hay: the absolute reference. Long fibres, low calcium (critical for adult chinchillas, as excess calcium causes urinary stones), ideal nutritional profile. In Europe and North America, reference quality brands available online include Oxbow Western Timothy Hay, Small Pet Select Timothy Hay, and Kaytee Timothy.
Orchard grass: an excellent alternative to timothy, slightly softer and appreciated by fussier chinchillas. Similar nutritional profile, long fibres. Can alternate with timothy to vary aromas and encourage hay consumption.
Meadow hay (botanical hay): a mix of various grasses. Nutritionally correct, appreciated for aromatic variety. Less standardised than timothy - verify the product is certified mould-free and contains no toxic plants.
Alfalfa hay: to be avoided in adults. Too rich in calcium (1.3-1.5 pourcent vs 0.4 pourcent for timothy) and protein. Reserved for growing chinchillas under 6 months or pregnant and nursing females, as a complement to timothy, not a replacement.
Flower hay: timothy or orchard grass enriched with edible dried flowers (cornflowers, marigolds, rose petals, lavender). No differential nutritional benefit, but can stimulate consumption in a chinchilla that refuses its hay. Useful as a complement, never as a replacement for standard timothy.
What to avoid: damp or mouldy-smelling hay (mycotoxin risk), freshly cut green hay (rapid fermentation that disrupts caecal flora), yellowed odourless hay (loss of nutritional and aromatic value). For storage tips that apply to both hay and kibble, see our how to store pet food guide.
Pellets: 10 to 15 pourcent of the diet, with strict selection criteria
The exact role of pellets in the chinchilla's diet
Pellets supplement the diet with vitamins, specific minerals, and plant proteins that hay alone does not fully cover. They must never be the dietary base, must never be available free-choice, and must be given in controlled quantities: approximately one to two tablespoons per day (10-15 g) for a healthy adult chinchilla of normal weight (400-600 g).
A chinchilla that finishes its pellets in ten minutes and is left with unlimited access will develop a preference for pellets (more palatable, more calorie-dense) at the expense of hay - exactly the most common and most dangerous mistake.
Selection criteria for good chinchilla pellets
Crude fibre: minimum 15 pourcent, ideally 18-20 pourcent. This is the primary criterion. A pellet too low in fibre does not compensate for insufficient hay and increases stasis risk.
Protein: 14-18 pourcent. Sedentary adult chinchillas have moderate protein requirements. Excess protein (above 20 pourcent) overloads the kidneys and can disrupt caecal flora.
Fat: maximum 3 pourcent. The Andean chinchilla is not adapted to a high-fat diet. A pellet with more than 4-5 pourcent fat promotes obesity and hepatic disease.
First ingredient: grass, hay, or grain crops. Never a cereal, never corn, never wheat.
Zero added sugar, zero honey, zero molasses. Even in tiny amounts, simple sugars disrupt the chinchilla's caecal flora.
Zero seeds, nuts, or fruit pieces. These ingredients are exactly what you find in cheap mixed pellets - and exactly what causes dysbiosis, diarrhoea, and stasis.
Uniform pellet format, not a muesli mix. A uniform pellet (a single identical shape) prevents the chinchilla from sorting ingredients and guarantees a balanced ration. Colourful muesli mixes are designed to appeal to the owner, not to correctly nourish the animal.
The best chinchilla pellets in 2026
Oxbow Essentials Chinchilla Food - A grade on PetFoodRate
The world reference recommended by exotic pet vets in Europe and North America. First ingredient: timothy hay. Crude fibre: 20 pourcent. Protein: 16 pourcent. Fat: 2 pourcent. Zero cereals, zero seeds, zero added sugars, zero colourants. Uniform pellet format. The formula has been stable for years, which matters for caecal microflora (formula changes = dysbiosis risk).
Science Selective Chinchilla (Supreme Pet Foods) - A grade on PetFoodRate
Second quality reference. Made in the UK, distributed across Europe. First ingredient: timothy hay. Crude fibre: 22 pourcent (the highest on the market for a uniform chinchilla pellet). Protein: 14 pourcent. No added sugars, no cereals. Slightly denser texture than Oxbow.
Burgess Excel Chinchilla Nuggets - B grade on PetFoodRate
Acceptable, slightly below the two above. Crude fibre: 18 pourcent. No cereals but contains beet pulp (fermentable fibre) in a secondary position. Protein: 14 pourcent. Acceptable if Oxbow or Science Selective are unavailable.
Products to avoid: colourful mixed feeds
| Product | Main problem | PetFoodRate grade |
|---|---|---|
| Vitakraft Menu Vital Chinchilla | Contains puffed corn, sunflower seeds, sugar | D |
| Versele-Laga Nature Snack | Mix with seeds and dried fruit | D |
| JR Farm Chinchilla Granol | Cereals first, too high fat (6 pourcent) | D |
| Padovan Grandmix Chinchilla | Non-uniform mix with sweet dried vegetable pieces | D |
These products are designed to look natural and varied. In reality, they contain exactly the ingredients that chinchillas cannot metabolise correctly. The low price is misleading: vet bills resulting from dental and digestive problems are substantial.
To understand why cereals are a problem for small herbivores, see our animal vs plant protein in pet food guide. Our worst pet food ingredients guide covers many of the additives found in these low-grade mixes.
What to never give a chinchilla
Sugary treats: a life-threatening risk, not an indulgence
The word "treat" is misleading. For a chinchilla, a dried apple round, a piece of grape, a raisin, or a banana slice represents a simple carbohydrate load that its pancreas and caecal flora cannot handle. Glucose is not correctly absorbed by the small intestine (which lacks sufficient digestive enzymes), ferments in the caecum, produces gas and lactic acid, disrupts the bacterial population, and can trigger stasis.
Products sold in pet shops under the label "chinchilla treats" are problematic by their very composition: honey sticks, seed wheels, sugar-coated biscuits, nut and berry mixes. These products are not appropriate for the species. Being sold in a pet shop does not mean a product is biologically suitable.
What to never give:
- Fruit: apple, banana, grape, strawberry, cherry, mango, pineapple. Even "dried" or "natural". Simple sugar content is too high in any form.
- Sweet vegetables: carrot, beetroot, corn, peas. Too sugary for the chinchilla's caecal flora.
- Nuts and seeds: walnuts, hazelnuts, almonds, sunflower seeds, pumpkin seeds. Too high in fat (30-50 pourcent). A single sunflower seed per day causes no immediately visible harm - but progressive accumulation over months contributes to hepatic obesity and dysbiosis.
- Human foods: biscuits, bread, crackers, breakfast cereal, chocolate (toxic), sweets, cheese, cured meats, any processed product.
- Cruciferous vegetables in excess: broccoli, cauliflower, Brussels sprouts. Can cause gas and diarrhoea if given regularly.
- Concentrated aromatic herbs: fresh basil, large amounts of parsley, garlic, onion. Dried parsley in a very small quantity (a pinch once a week) is tolerated but should not become routine.
Permitted vegetables - with strict moderation
A few vegetables can be given in very small amounts (once or twice a week, a few square centimetres maximum):
- Non-sweet leafy greens: a few leaves of romaine lettuce, lamb's lettuce (mache), watercress
- Fresh herbs very occasionally: a few sprigs of parsley or dill, rarely
- Dandelion leaves (fresh or dried): well tolerated and generally appreciated
The rule: when in doubt, do not give it. The risk of GI stasis from an inappropriate treat is real and can be fatal within 24 hours.
Water: essential and frequently neglected
Chinchillas need fresh water available at all times. A 500 g chinchilla drinks 30-50 ml of water per day under normal conditions. This increases if the room is warm or if the diet is dry (as it is for a hay-and-pellet ration with few fresh vegetables).
Water bottle or bowl? A water bottle is preferable as it prevents contamination of the water by hay or faeces. Choose a glass bottle rather than plastic (plastic retains bacteria and alters taste). Clean the bottle with an appropriate brush every 48 hours minimum. Water should be changed daily even if the level has not dropped.
Water quality: tap water is generally acceptable if it is not excessively chlorinated or calcareous. If in doubt, filtered water or a low-mineral spring water is preferable. Avoid water high in sodium.
How to read a chinchilla pellet label
For a complete label-reading method applicable to all pet foods, see our how to read a pet food label guide.
A pellet's composition tells you everything. Here are the elements to check in under two minutes in a pet shop or online:
The ingredients list: descending order by weight. First ingredient = the dominant component. If it is "timothy grass", "timothy hay", or "grass meal": a good sign. If it is "corn", "wheat", "oats", "cereals": a warning sign.
The guaranteed analysis on the back panel:
| Nutrient | Target value | Warning value |
|---|---|---|
| Crude fibre | 18-22 pourcent | below 15 pourcent |
| Crude protein | 14-17 pourcent | above 22 pourcent |
| Crude fat | 1.5-3 pourcent | above 5 pourcent |
| Crude ash | 5-7 pourcent | above 10 pourcent |
Ingredients that should not appear:
- Sugar, sucrose, dextrose, molasses, glucose, fructose
- Cereals: corn, wheat, barley, oats, sorghum
- Seeds: sunflower, flax, sesame, pumpkin
- Dried or freeze-dried fruit of any kind
- Artificial colourants (E102, E110, etc.)
- Synthetic preservatives (BHA, BHT, ethoxyquin)
Format: uniform pellet is always preferable to a muesli mix. If the packaging shows multi-coloured grains, vegetable rounds, and fruit pieces, the chinchilla will sort the ingredients and eat only the most calorie-dense and sugary elements.
Feeding by age and health status
For age-specific guides on other animals, see our senior cat nutrition guide and our best senior dog food guide - the principles of reduced calories and adapted texture apply across species.
Young chinchillas (0 to 6 months)
Growing young chinchillas have slightly different needs. Alfalfa hay can be integrated in small amounts (20-30 pourcent of total hay) for its calcium and protein content. Pellets can be given in slightly higher quantity (15-20 g/day) to support growth. Hay remains the base at 80 pourcent minimum. No sugary treats at any age.
Pregnant and nursing females
Energy and protein requirements increase significantly. Pellets can be slightly increased (20-25 g/day) and alfalfa hay can supplement timothy during gestation. Water should be checked twice daily as consumption may double. Treats remain forbidden.
Senior chinchillas (7 years and older)
Chinchillas can live 10-15 years in good health. From 7-8 years, monitor weight (progressive weight loss may signal dental problems or renal insufficiency), dropping quality (smaller, less round = slowed transit), and hay consumption. If an older chinchilla eats less hay, offer softer hay such as meadow hay or finer-cut timothy.
Summary: the ideal adult chinchilla diet
| Food | Proportion | Modalities |
|---|---|---|
| Timothy hay (or orchard grass) | 80 pourcent, unlimited 24h/day | Always fresh, never damp |
| Grain-free uniform pellets | 10-15 pourcent (10-15 g/day) | Once daily, not free-choice |
| Leafy greens (optional) | Trace (1-2 times/week) | Non-sweet green leaves only |
| Fresh water | Unlimited | Changed daily |
| Fruit, nuts, sugary treats | NEVER | Life-threatening GI stasis risk |
To compare available products, use our comparison tool or browse the full product pages.
For other small animals, read our guinea pig nutrition guide, our rabbit nutrition guide, and our ferret nutrition guide.
For more on reading labels, see our how to read a pet food label guide. If you want to go deeper on gut health and transit, our probiotics in pet food guide explains intestinal flora in detail. To compare products by brand, see the best dog food 2026 ranking and our full product comparison tool.
Sources
- AEMV (Association of Exotic Mammal Veterinarians) - Chinchilla Nutrition Guidelines - 2023
- Quesenberry KE, Carpenter JW - Ferrets, Rabbits, and Rodents: Clinical Medicine and Surgery - Elsevier Saunders, 3rd ed., 2012
- Mitchell MA, Tully TN - Manual of Exotic Pet Practice - Saunders Elsevier, 2009
- Johnson-Delaney CA - Exotic Companion Medicine Handbook for Veterinarians - ZEN, 2015
- Chinchilla Club International - Chinchilla Diet and Nutrition Guidelines - 2024
- House Rabbit Society - Small Mammal Nutrition Reference - 2023
- Sophie Lefevre, Species Nutrition Specialist, PetFoodRate