13 yo diabetic Basset Hound named Daisy. She is pretty well controlled with insulin twice a day, and she has been on Science Diet w/d for over a year. In May 2013, she had a large cyst removed from her left hip. In Oct, over the course of 24 hours, she got a bump, it drained, the skin got raw, and the hair fell out. We had lab work, nothing definitive. She was on antibiotics, oral and topical. It got better, the hair grew back. Early in December, same thing happened, same treatment and result. We left her at the kennel (her vet) for a week earlier this month, and she had a huge outbreak. We got her out 10 days ago, and whatever it is is spreading. The drainage doesn't last longer than a few hours, the skin seems to be slightly irritated, but the hair comes out in clumps and she smells. Vet says she doesn't know, but thinks some form of cystic adenoma. We are on third round of antibiotics (different one this time). I try to hot pack it once a day if Daisy will let me, I clean it twice a day, and apply topical antibiotic.The area has progress from about the size of a small hand to about 8 inches in length and 4 or so inches across. The older area is growing back the hair and has stopped draining. She doesn't act like it bothers her.