Straight from the fridge: why food temperature changes an older cat's appetite
Published by Planète Pets · managing editor: Clément Lacaille · how our guides are written
A cat turning its nose up at the bowl usually triggers a cascade of responses: switch brands, switch texture, add water, try a treat. A far simpler lever is almost always overlooked, even though it is the only one whose effect has been measured properly in older cats: the temperature the food is served at. Our guidance is gathered in the cat food section.
Contents · 5 sections
A preference study at three temperatures
Rebecca Eyre, Maxine Trehiou, Elizabeth Marshall, Laura Carvell-Miller, Alexandre Goyon and Scott McGrane published a study in 2022, in the Journal of Veterinary Behavior, titled Aging cats prefer warm food (see the study). Domestic short-haired cats over 7 years old were offered two bowls of the same chunks-in-gravy wet food, served at 6 °C (straight from the fridge), 21 °C (room temperature) or 37 °C (the body temperature of prey). The ranking is unambiguous: cats preferred the warmer option in every pairwise comparison, giving 6 °C then 21 °C then 37 °C in increasing order of preference.
It isn't the texture, it's the smell
The genuinely interesting part is the control the authors built in. Gravy viscosity, measured with a viscometer, was practically identical at all three temperatures: warming did not make the food runnier or easier to lap, so texture does not explain the choice. Chemical analysis of volatile compounds, on the other hand, showed that 11 of the 15 classes measured varied significantly with temperature. What changes when you warm wet food is what the cat smells — not what it chews.
That ranking of smell above everything else explains a lot of apparently fussy refusals, and lines up with the causes detailed in our article on a cat that stops eating.
What to do with it at home
- Take the pouch or tin out of the fridge ahead of time, or warm the portion to body temperature — lukewarm to the finger, not hot. That is the best-documented gap in the study.
- Failing that, at least serve at room temperature: simply going from 6 to 21 °C is already a measured gain, with no equipment and no effort.
- Don't try to change the consistency by adding hot water or blending: viscosity was identical at all three temperatures, so that isn't the lever.
- Serve right after warming, and don't go beyond lukewarm: the effect runs through aromas that dissipate, and nothing was tested above 37 °C.
What the study does not show
A two-bowl test measures a relative choice over short sessions: it demonstrates neither better long-run intake nor weight gain. The population is limited to domestic short-haired cats over 7, on a wet chunks-in-gravy food — nothing here covers kibble or younger cats. No specific class of molecules was identified as driving the choice, and the authors work at the Waltham Petcare Science Institute, funded by a pet food manufacturer: worth knowing, even though the protocol is solid and the viscosity control an honest one.
Frequently asked questions
Can wet food be warmed in the microwave?
The risk is creating hot spots and overshooting the target well past lukewarm. A quick water bath, or simply taking the food out of the fridge early, gives a more even result; either way, test the temperature with a finger before serving.
Does this apply to kibble?
The study only covers a wet chunks-in-gravy food; nothing was measured on dry. The comparison of the two formats is covered in our article on wet versus dry cat food.
Is a cat that snubs its bowl always a temperature problem?
No. Any drop in appetite lasting more than 24 hours in a cat warrants a vet's opinion, whatever the food temperature. Find all our guides on the cat hub.
An accessory from our shop for this use: Raised-edge silicone feeding mat for cats (€25.90) · the whole shop
For your cat, at Le Félin (same family, zero commission): Arbre à chat en bois flotté (from €219.99)
This guide is part of Planète Pets’s Cats universe. Our advice is general in nature: for any health concern, your veterinarian remains the only reference.
