I have a male guinea pig just over a year and he weighs 4 lbs.. I know he is really fat because even the vet said so. I am just wondering what should I do to get him to lose weight? I give him a lot of timothy hay and pellets.. He has a big cage and can run around but tends to yawn and lay all the time.. He only gets up to eat/drink. He also gets floor time 2-3 times a week for 30 to 45 mins each but he just sits there and doesn't move. What should I do? I have tried toys and tubes he can go in/out of but he's really lazy. Any suggestions i'd greatly appreciate it. Thanks!

