We first got one of these heating pads when we had two elderly cats to help them keep warm in our new home that had hardwood floors and not many rugs or much furniture. We put them inside and on top of a small kitty condo we had. I thought the cats would just use them at night, but they ended up loving them and used them all the time. When our older cats died and we’d adopted two kittens, Raven and Sage, I thought I’d put the pads away. But they loved them too. It makes them all melty and happy.
These are special heating pads that won’t get too hot, are protected against moisture, some stay just above room temperature when not in use and warm up more when a pet is on it, and they have covers that are washable. Ours are similar to this. These are great for cats, especially kittens and older cats. Small dogs would love them too. And a lot of large dogs would like them, especially those with hip problems or old injuries. Our dog Saffron has her own large heated pad.