Does anyone use heated cat pads/beds? Little Cat is getting on now (we think she's coming up to 15) and she has one of those snuggly cat nests which she sleeps in at night. I'm just worried that she will still feel the cold at night when the heating goes off. She sleeps upstairs but likes to sleep in the study away from my ginger boys. She only weighs just over 2kgs (she's always been this small) and she's smooth haired so doesn't have a nice thick coat. Is it possible to put a heated pad inside her nest for added warmth or am I overthinking this?