Free reference · Adult maintenance · VIN-sourced
How much should I feed my ferret?
Published guidance answers this with a range, honestly stated: an adult ferret needs about 200–300 kcal per kg of body weight per day (VIN Veterinary Partner and the Indiana BOAH care guidelines; both note individual variation is very high). At the 250 kcal/kg midpoint, a 1 kg (2.2 lb) adult ferret lands near 250 kcal a day — and anywhere between 200 and 300 kcal for that weight is inside the sourced range. Adult maintenance only — nothing more.
Informational, not veterinary advice. What to actually put in the bowl — hay, pellets, fresh food, treats — is a different question this page does not answer; your vet should guide that.
Adult maintenance reference · VIN
The formula, and what it gives
250 kcal × body weight in kg per day (sourced range: 200–300 kcal per kg)
| Adult weight | Midpoint kcal/day | Sourced range |
|---|---|---|
| 0.7 kg (1.5 lb) | ≈ 175 kcal | 140–210 kcal |
| 1 kg (2.2 lb) | ≈ 250 kcal | 200–300 kcal |
| 1.5 kg (3.3 lb) | ≈ 375 kcal | 300–450 kcal |
| 2 kg (4.4 lb) | ≈ 500 kcal | 400–600 kcal |
Source: VIN Veterinary Partner "Nutrition for Ferrets" + Indiana BOAH ferret care guidelines: adult maintenance 200-300 kcal/kg/day (linear per kg, not allometric); both note individual variation is very high. Midpoint 250 implemented.
Checked against the source on 2026-08-08. The PetLife app computes this exact reference from the same constant, with the source named on screen.
Growing ferrets need more
The number above is for healthy adults. Growing, pregnant, nursing, and recovering ferrets need more than adult maintenance, and the cited guideline gives no factors for those stages — so neither does this page. If your ferret is young or in any of those situations, feeding amounts are a question for your vet, not a formula.
No weight-loss targets here — on purpose
The cited references note that individual variation in ferrets is very high, and they provide no weight-loss protocol — so neither does this page. A healthy individual can legitimately sit anywhere in the sourced 200–300 kcal/kg range; a change you did not plan is a vet conversation.
What this page is — and is not
It is
An adult-maintenance energy reference from a named, published guideline — the formula, the citation, the date we checked it, and worked examples. It is the same constant the PetLife app uses for ferrets, so the page and the app cannot disagree.
It is not
A diet plan, a life-stage chart, or a weight-loss program. The cited references give no life-stage, spay/neuter, or weight-loss factors for ferrets — so this page refuses to invent them. The app takes the same position: it tracks what you feed and weigh, it never prescribes a treatment.
Keep the number where you feed
Track meals and weigh-ins against this reference, free, in the PetLife app
The iPhone app carries this exact ferret maintenance reference — with the source named on screen — and keeps meals and weigh-ins on one chart. One pet with core care logging stays free.
Why is there no bird page?
Because we could not find one honest number. The published avian energy literature is split on the key constant — a widely used non-passerine value (78) versus a psittacine-specific one (175), a 2.2× spread — and presenting either as the answer for your bird would be an invented choice. PetLife’s engine has a standing rule: no constant without a citation. Birds stay unsupported until the literature supports a number we can stand behind, and this page would rather tell you that than guess.
Have a dog or cat?
The interactive Feeding Calculator computes a personalized daily target for dogs and cats — life stage, spay/neuter, and body condition included. The calculator stays dog & cat only; ferrets and their neighbors get these sourced reference pages instead.
Informational, not veterinary advice.
This page is an educational reference built from the published guideline named above. Nothing here is veterinary or medical advice, a diagnosis, or a treatment plan. Always consult a licensed veterinarian about your ferret’s weight, diet, or health — and never delay or disregard professional veterinary advice because of something you read here. A pet that stops eating or loses weight quickly is a same-day vet call, not a reference-page question.