Hi, I have a two-year-old angora rabbit. I've noticed that near her vent (is that what you call it?) she has something that looks like a swollen bubble. Also, how do you clean a rabbit's bottom? I usually cut off the dirty fur, but I'm afraid to cut too close, so there are some areas of her bottom that have poop and urine stains that she hasn't cleaned herself. Maybe the vet can clean her up? Thanks!