instinct
Burrowing Under Blankets and Duvets
Warmth, security and a den instinct
Some cats dive under the covers and stay there for hours. It combines three things cats want at once — heat, darkness and an enclosed space with one exit.
Cats are built for a warmer climate than most houses provide. Their thermoneutral zone — the temperature range at which they need to spend no energy on staying warm — sits well above ours, somewhere around thirty degrees, which is why a cat will find the one patch of sun in a cold room and lie in it until it moves. A duvet traps body heat efficiently, and a cat underneath one has found the warmest place in the house without having to wait for the weather.
Warmth alone does not explain the burrowing, though. Cats are den animals as well as climbers, and an enclosed space with a single entrance is a defensible position — the same logic that puts them in cardboard boxes, drawers, laundry baskets and paper bags. Under the covers, a cat is hidden, insulated, and surrounded on all sides by the scent of the person it lives with. For many cats that combination is more attractive than any bed you could buy.
The behaviour is more common in some cats than others, and the pattern is fairly predictable. Thin-coated and hairless breeds — Sphynx, Devon Rex, Cornish Rex, Siamese — burrow far more than heavily coated ones, because they genuinely lose heat faster. Elderly cats and arthritic cats seek warmth for comfort. Kittens raised in a pile of littermates often keep the habit for life. And anxious cats use it as a retreat, which is worth noticing rather than discouraging, since a cat that has somewhere to hide copes with household stress far better than one that does not.
Two practical cautions apply. Suffocation risk is low but not zero in very young kittens, elderly cats, or anywhere a cat could get trapped in tightly tucked bedding, so heavy covers should stay loose enough for a cat to get out easily. And a cat under a duvet is invisible: the real hazard is a person sitting or lying down on it, which happens more often than owners expect. A quick check before you get into bed is a reasonable habit in a house with a committed burrower.
If a cat that never burrowed suddenly starts, and is also hiding during the day, sleeping more and seeking heat sources persistently, that is a different picture. Cats seek warmth when they feel unwell, and a sustained change in this direction is worth a veterinary conversation rather than a new blanket.
🐾 Most common in
Especially common in Sphynx, Devon Rex, Cornish Rex, Siamese and other thin-coated or Oriental breeds, and in kittens, senior cats and cats with arthritis. Some heavily coated breeds never do it at all.