I just got a pair of female guinea pigs about 3 years old from a family friend who kept them in C&C cages or an outdoor pen when the weather was nice. I noticed that one of them looks like she's breathing hard, but I can't hear her breathing, no wheezing, just some grunting sounds when she's eating in particular. She eats quite literally like a pig, drinks a lot, runs around a lot, poops regularly, and has no other apparent health issues (clear eyes, no nasal fluids, etc.). If you watch the video, you can see her sides down by her hips moving in a way that I assume isn't normal. I haven't had time to take her in for a vet because of the holidays, but do people have any idea what could be up with her? When she sits still, it looks like she's rocking back and forth very slightly. [video=youtube;6-XwUuksfNg]https://www.youtube.com/watch?v=6-XwUuksfNg&feature=youtu.be[/video]