I've haven't had much luck finding info on how to get a good idea of how old a guinea pig is. I can assume she's still very young just because of her size compared to adult pigs I've had but that's not exactly foolproof. She was abandoned at a pet boarding facility and the employees had been feeding her Oxbow young guinea pig food but I have no idea if they knew how old she was or they were just feeding her that because they didn't know the difference. Are there any fairly accurate ways to tell how old a pig is? I mostly wanna know so I can switch her to adult guinea pig food if she's old enough.