I am having a few problems with my red-eye, Darwin. The biggest one is that he WILL NOT EAT. I have had him for a week now, and I have not seen him eat once. I tried taking him out of his tank to feed him, and have put crickets in his tank. I looked back in the tank the next day and found all three crickets that I put in. He is rather big, the biggest one they had in the pet store, so I would tend to think that he would be hungry at some point. I am starting to get worried also because he has changed colors dramatically since I got him. I know that he isn't happy, but I don't know what to do to make it better. Also, he sleeps all day and night. Is this normal?