Hello, I have a guinea pig and before I would feed it some lettuce here and there but I wanted to give them some extra stuff so I started to use this for a bag but he would eat everything but the pellet. So then I switched back of to just pellet food and stopped giving him lettuce so he would eat the pellet and hey. That was about a week ago. He has not eaten anything, at all. I would refill his bowl of food and hay everyday with fresh water and he wouldn't do anything. He didn't eat at all. So today I noticed that he has been in the same spot of the cage and so I was worried that he was really sick so I gave him some lettuce again and he chowed down on it. That's the ONLY thing he will eat. any help to get him to eat pellets and hay?