How Much to Feed a Devon Rex
Devon Rexes' delicate curly coats and sensitive digestive systems require high-quality, easily digestible proteins to maintain coat shine and gut health. Using the veterinary RER/MER formula, an adult Devon Rex of about 7 lbs needs roughly 200 kcal per day — around 53 g (0.5 cups) of typical dry food. The calculator below is pre-set for the Devon Rex: adjust the weight, life stage and food type to match your cat.
Devon Rex portion calculator
Veterinary RER/MER formula — daily calories, grams and cups.
RER 167 kcal × 1.2 (adult, neutered/spayed) = 200 kcal, at 380 kcal/100g. Estimates for healthy pets — always confirm with your veterinarian.
Cats are obligate carnivores with a metabolism that differs sharply from dogs — their energy multipliers are lower, and an indoor Devon Rex often needs even less than the 200 kcal this calculator estimates. Many cat foods overstate portions on the label. Weigh the daily amount (about 53 g of the selected food) rather than free-pouring, and use a body-condition check monthly: you should feel ribs under a thin fat layer.
A healthy adult weight for the Devon Rex is around 7 lbs (3.2 kg), which yields a resting energy requirement (RER) of 167 kcal. Multiplied by the adult, neutered/spayed factor of 1.2, the daily target is 200 kcal — roughly 100 kcal per meal over 2 meals. Wet food changes the volume dramatically: at ~95 kcal/100g you would serve about 211 g of canned food instead.
These numbers are a starting point, not a prescription. The calculator supports every life stage (kitten, adult, neutered/spayed, adult, intact, senior, weight loss plan) — a kitten can need two to three times the adult allowance, while a senior or a cat on a weight-loss plan needs noticeably less. Recheck the numbers after any change in weight, activity, food brand or neutering status, and always transition between foods gradually over 7–10 days. For medical conditions, pregnancy or lactation, follow your veterinarian's feeding plan instead.
Frequently asked questions
How much food should a Devon Rex eat per day?
A typical adult Devon Rex weighing 7 lbs needs about 200 kcal per day (adult, neutered/spayed), which is roughly 53 grams — about 0.5 cups — of standard dry food, split into 2 meals.
How is the Devon Rex's daily portion calculated?
We use the standard veterinary formula: Resting Energy Requirement (RER) = 70 × (weight in kg)^0.75, then multiply by a life-stage factor. For a 3.2 kg Devon Rex, RER is 167 kcal, and the adult, neutered/spayed factor of 1.2 gives 200 kcal per day.
How many times a day should I feed my Devon Rex?
2 meals per day is the standard recommendation for a adult, neutered/spayed cat — about 100 kcal (26 g of dry food) per meal. Puppies and kittens need 3–4 smaller meals instead.
Should I feed my Devon Rex wet or dry food?
Both can be complete diets; what changes is volume and water intake. The same 200 kcal daily target is about 53 g of dry food but roughly 211 g of wet food. Many owners mix both — just keep the combined calories at the target.