A heating pad delivers a continuous heat source from a low-voltage element, with adjustable or fixed temperature. An insulated bed holds body heat through filling and an enclosed shape, needs no power, and depends on the cat's own warmth.

Pads suit seniors, kittens and post-surgery cats needing warmth, but require chew-resistant cabling and a low setting, since long contact risks low-temperature burns. Insulated beds suit cats wary of appliances and those that like to burrow.

The trade-off is heat against risk: a pad is direct but stops in a power cut, and chewed cables are a hazard, while an insulated bed carries no burn risk but its ceiling depends on room temperature and is limited in very cold rooms.

Decide by indoor temperature and health status: a pad with supervision in a cold room, an insulated bed and draught-free spot as the default. Warmth needs in senior or arthritic cats should be assessed by a veterinarian.