I've had my guinea pig, Bella, for about 3 years now. She got sick about a month ago(losing weight, less muscle,etc…), but got quite better with me giving her more vitamin C. then one day I came home and found her laying on her side unable to get up. I know she hadn't gotten better all the way from before, but I figured she was getting old. I'm not sure about her real age since I got her from a pet store(adopted). all the things I've thought she might have had were:scurvy, malocclusion, and anorexia. I'm not real sure of them and I was wondering if it could be old age. what are the signs and what can I do to help her? Her symptoms are runny nose, a little bit of eye discharge(definitely not a lot), weight lose, and weak muscles(unable to pick her self up sometimes) and she seems to want to eat but not nearly as much. also, she doesn't want her favorite food…carrots. one more thing is she doesn't make any noises, but little noises that kind of sounds like l chewing and grunting at the same time (they are so faint I can hardly tell). I've given her apple sauce, her own real pellet food mushed with water, water, orange, and a few greens. She is putting on some weight and I'm feeling some more hope for her(she is also pooping more which she hadn't done now that she's sick; I figured it was from not eating). Please help me figure out what's wrong. thanks!