Lo and behold, she had a ruptured anal gland, and even though it had drained substantially already, they had to drain it even more. She was such a brave girl! Now she has a raw spot about the size of a quarter on her backside, and we're to try to put warm compresses on it, as well as Derma-Vet ointment. We'll try, but I'm not holding my breath! They gave her a Convenia shot rather than Clavamox, and we'll follow-up with another appointment next week to make sure the wound is healing properly. While we were at it, we went ahead and did her annual exam, complete with senior blood work, etc. $205 just for the blood panel!