I have a 7 year old mix who Ive taken to two vets already and no one seems to know whats wrong. It started yesterday (10/20) with a lemon sized lump type thing on her lower chest. I took her to the vet he said it looked like she got bit by something, gave her a shot of metacam and some previcox to go home.Everything seemed fine, even the swelling was going down till late this evening (10/21), the lumps moved all over he belly and chest and are turning purple and red. I took her to the emergency vet and they had no idea. They gave her a pain shot. Please help.