Erika Moon

My 18 month old female has developed a strange swelling and hair loss in the area between her anus and vulva. The swelling is soft and does not seem to bother her, nor is it causing issues with urination, but it has swelled such that it overhangs the bottom (top?) of the vulva when she is standing.

She was due to come into season in September, but has yet to do so. I don't think this is from that, however, as there is no discharge, the vulva itself isn't swollen, and my male dog is only mildly interested in her hind end.

So... has anyone seen anything like this before? We're off to the vet tomorrow for a heartworm test and her three-year rabies shot anyway, so I'll be bringing this up, but figured it couldn't hurt to hear from someone else who might have had this happen before.

Also, should I go ahead with the rabies shot? She's had a bout of diarrhea the past few days, which I've attributed to some particularly fatty lamb brisket (I feed a raw diet). Between that and her baboon-butt swelling, I'm not sure if vaccinating for anything is a good idea right now. She's otherwise in good condition and acting fine.