My guinea pig, Blueberry is a Girl and lives with another girl and a boy. She is the oldest at 3 years old and has been making very wierd noises. It sounds like a very out of breath cough and it happens at random times of the day. I am very concerned because a few months ago she got a small lump on her side. It is hard but round and covered with fur. I started giving her some water and a clean cage. Her stomach is hard but she is light. I also noticed that her Stomach is big and round but her head is very small. Shes at a healthy weight of 660g. We have had a other guinea pig that died a year ago could it be anything about that? We are not bringing her to the vet because here in switzerland if a guinea pig is ill they just put it down. Need help as soon as possible.