I have a seven year old columbian Red tail boa who's behavior has changed recently. He was always a very aggressive feeder (had him since newborn). Now he is reluctant to feed and is loosing some of his vitality. His skin has a rough feel to it, almost like he is dehydrated. He was always VERY docile. Now he is getting aggressive. I don't see any obvious signs of infections, mites, etc. He also just had a normal shed. I do have a vet appointment but I was wondering if anyone has any suggestion as to what his problem could be. Thanks for your help.

