Join Date: Aug 2009
Location: secret mountain valley
A recurring wound like you're describing is typically a sequestrum. The vet will be able to fill you in on more. The best thing you can do is to continue to keep the area clean and I do not suggest attempting to drain the other pocket. Can you post some pics?
Your story is a very good example of why you should never buy a horse without a vet check (which I assume you did not do as you are unsure of her pregnancy status). I hope everything works out for the best, good luck!