My Guinea Pig, Truffle, who is beginning to recover from his illness has began to eat baby oatmeal. Truffle began to lose the will to eat and drink due to his illness which made him very weak, so i am feeding him through a syringe 3 times a day. We have tried baby food, doesn't like it, but then we tried baby oatmeal and he can't get enough of it. Plus, Truffle is serioously under weight and in a day he gained .4 ounces. So if you ever have to feed a guinea pig like I did, use baby cereal, oatmeal.