I took ginger to the vet this morning because he has a very bulging eye. I thought it may be a tumor and was expecting the worst but after a good check over the vet said he was not in any pain and would be able to carry on with his eye as it is. He can't see out of the eye but was an ideal weight and acting like a normal guinea. Also I asked about the other guinea pigs ears being chewed which I posted on another thread and the vet thinks it was the other guinea in the cage that did it.