My boyfriend and I have a 20 year old cat. She's always wanted to be around us and was a lap cat. She also used to sleep with us. Now she spends most of her time in the kitchen, lying close to the refrigerator. It looks like she wants to be near the vent at the bottom that feels kind of hot. She likes to keep her back to it. I'm wondering if it acts like a sort of heating pad for her, and maybe she has arthritis? It's the heat of the summer where we live, and she's a furry cat, so it makes no sense why she'd want to be near a heat source. Any insights?