Hi, I’m asking for a close friend with a female sheltie.. Friend is currently at another vet with her sheltie. Annabelle has looked like this (pic attached) since Thursday morning. She was in the vet hospital for 3 days, discharged on Saturday. Back to vet today with high fever, rapid breathing and listlessness. They have no idea what could be wrong. Bite? Mange? Cancer? The sheltie lives in a very nice home, nice neighborhood with another Sheltie who has no symptoms at all.