Gosh, I hope she's not allergic to fish.
She was on antibiotics for 14 days. Has been off them for the last 14 days but the irritation started months before she started on the antibiotics.
I looked up dog vaginitis and that seemed to fit. I am going to try washing the area 2-3 times a day with medicated soap and using some antibacterial cream and cornstarch to keep it dry. It said that the inverted vulva and surrounding skin folds can cause irritaion and bacterial overgrowth and the licking can also keep it from healing.