Has anyone used a heated pad/bed for their cat? Sophie has arthritis, especially in her hips, and the cooler weather is really affecting her. She gets Duralactin mixed with her food, but she's getting pretty foxy in her old age, and tries to avoid eating the bit of food with the capsule contents mixed in it. I'm going to see if I can find another supplement to give her, but am wondering about getting a heated pad for her. For the past few weeks she's been hanging out in the coldest corner of the house (silly girl), and she's really getting stiff, so much so that she won't even try to step into the litter box (that's a whole other story). Any advice would be appreciated.