I woke up this morning to one of my guinea pigs limp in their cage not responding to anything. I took her out and could tell she was dying with her limp body and no response to anything. She has sudden gasps for air and blinks but that's about it. Days prior to this she was losing weight but was eating with a large appetite still. She is urinating but I'm not sure if she has been pooping or not. She did have a upper respitory infection when I got her but that's was taken care of 3 years ago. This may sound morbid but I don't taking her to a vet would cure this. I will take her if she keeps doing this to end her suffering but I just want to know what caused this to prevent it from happing to the other piggies.