My 15 year old dog, who still thinks he’s a 2 year old pup, has grown a massive lump on his right upper leg. It came about rather quickly 9 months ago and was the size of a golfball. We went to the vets office and they said it was best to leave it alone. A few months later he caught it on something so i took him back in. They put 2 drains in it and it drained for about a week. But shortly after they took out the drains it doubled in size. And has now tripled. They said his heart is too unhealthy for anesthesia. For the last two months it has been draining itself almost once a week. It’s hasn't bothered him but this week it produced an ulcer and bled a little. We took him in today and they didn’t want to touch it. They sent us him with antibiotics and anti inflammatory pills. We’ve been referred to a specialist. But they said that could take time to see him. Has anyone else experienced this with their dogs?