I've had three alligator lizards in a huge terrarium along with frogs/geckos for the last three years. There are two large males and one medium-sized female. They have all been growing healthy for these three years. I just checked on them and one of my big (and probably old) males was twitching. I picked him up and he continued to twitch in my hand. He has been feeding well, his tail is nice and meaty, and he's still flicking his tongue. The temps in the cage are as they've always been and there are no new animals in the cage. Despite all this, he can't stop twitching and is very sluggish. Does anyone have any ideas???

