I think my betts has gone blind. he is 2 years old and has always eaten right away and excitedly. He has not eaten in 3 weeks. He just lays there looking dead all day. he doesn't eat at all. His water is warm, he doesn't appear diseased but I noticed about a month ago, his eyes looked different. They used to be almost black and a month ago, went clear kind of. I am not sure what to do. I am heartsick thinking he is starving and suffering.