I am a fairly new owner and I do not know everything about Guinea pigs. My one pig Totoro has green crust around her left nostril, and occasionally seems to breath a bit heavy. That could be because i turn on the heater in my room but, she also sneezes, and tries to wipe her nose. I do not know what to do as my parents refuse to take her to a vet, and I am not sure what is wrong. From what i have seen she poops, pees, eats, and drink. She is not very active ((shd never really was)) but, I am very concerned about her and if anyone has advice I would love and appreciate it.