Hi, Nana's stopped going to bed when the cold weather started, so I put in extra hay and kept an eye on him. Then he stopped eating his pellet food, I've tried other kinds, but he only has a very small amount, and he is only eating half his veggies too. The vet treated him for mites, and he is a lot perkier, and is going to bed early and getting up late now its cold, which is good. But should I be worried about his appetite? Can he survive on Timothy Hay and a small amount of veggies twice a day? He's about six.