Heat level: gentle and even, never hot
For an arthritic cat, the therapeutic value of a heated bed is in mild, steady warmth that loosens stiff joints, not in strong heat. Look for a bed or pad designed for pets that warms to roughly body temperature and spreads that warmth evenly, rather than a human electric blanket, which can run far too hot and concentrates heat unevenly. A thermostat that holds a constant low temperature, or an automatic shutoff after a set period, protects a cat that may sleep deeply and move slowly. Pressure-activated pads, which warm only when the cat is lying on them, are a sensible option for the same reason. Whatever you choose, check the surface with the back of your hand after it has run for a while: it should feel comfortably warm, never hot.
Support matters as much as warmth
Heat on top of a lumpy, sagging bed will not help arthritic joints much. The base should be firm and supportive, holding your cat's body level rather than letting hips sink into a hollow, and thick enough to insulate from a cold floor. Memory foam and orthopaedic-style pet beds suit many arthritic cats, provided the surface is not so deep and soft that pushing up to stand becomes a struggle. Size the bed generously: an arthritic cat needs to stretch out fully and change position without falling off an edge, and many prefer to lie flat with sore limbs extended rather than curled tight. A washable, removable cover is essential, because older cats have more accidents and the bed will need regular laundering.
Entry height and the cat's route to bed
The best bed fails if getting in hurts. Choose a design with one low or open side your cat can walk into rather than climb over, especially for a cat whose shoulders and hips are stiff. Place the bed where your cat already chooses to sleep, in a draught-free corner away from busy doorways, because arthritic cats value routine and will ignore a superior bed in a strange location. The route to it should be clear and, on hard floors, covered with a mat so the last steps are not slippery. Always leave an unheated sleeping option nearby: a cat must be able to move off the warmth when it has had enough, which is both a comfort and a safety requirement, particularly for a cat with limited mobility.
Electrical safety and supervision basics
Buy a bed made for pets, with a chew-resistant or armoured cable, and route the cord where it cannot be trailed across walkways or worried at by teeth. Plug into a socket directly rather than an extension lead where you can, and inspect the cable and pad regularly for damage, scorch smells, or areas that have stopped warming evenly. If your cat is very frail, incontinent, or unable to move off the pad easily, discuss heated bedding with your vet first and consider using it only while you are home and checking in.
Introducing the bed and watching the result
Let your cat discover the new bed with its own blanket on top so it smells familiar, and warm it before the cat's usual nap time so the benefit is obvious at first contact. Most cats vote within a few days. The result you are looking for is practical: easier rising after sleep, less stiffness in the first steps, and the cat choosing the bed voluntarily. Note those changes with dates, because whether warmth is genuinely helping is useful information for your vet when arthritis care is reviewed. Keeping that note in KinsLe's Pet Passport, alongside your cat's joint history and visit records, means the detail is there at the appointment rather than forgotten at home.