I have a pair of california kingsnake which I picked up in the summer. The male always had trouble eating, since the previous owner fed live, and I was trying to switch them to f/t. The female switched easily, first time. I assumed the male wanted to burmate since he was always avoiding the heat and would not eat, so I burmated him, but the female stayed at normal temperatures. I took the male out of burmation about 2 months ago and I noticed that he was so weak that he could not pull his body up if it was hanging. He also began to shake during the effort. I assumed that being off food for so long made him weak because the female was still fat and healthy. I began feeding him heavily to get weight back on. Since warming up, he now eats great, but the shaking and weakness has not gone away. He still eats like a champ, and is always active in his enclosure. Recently, the female also began showing similar symptoms. She too is still very active in her enclosure, although she refused food for the first time this week.
I am really not sure what this is, has anybody else had this happen?
(Oh, and I have checked their mouths for a respiratory infection, and there seem to be no signs. No heavy breathing, no bubbles or extra saliva.)