Q. My first grade classroom's Guinea pig is 6 years old, eats a lot but has gotten very bony. In the last two or three weeks. What should I do?
DAVID ELBEZE, DVM, MRCVS
A. First of all 6 years old for a guinea pig is a very old age, so it's probably not going to be good news. If he eats well and doesn't have soft stools, he could very well have a tumor that would explain the weight loss. Take him to the vet, sometimes those tumors can be palpated or seen easily. Unfortunately there is no cure for such tumors. If he has soft stools he might have a gastrointestinal problem which might be treatable with medications.