I was told that the twat and nipples do not go back to the original size after heat. I never noticed this when I was younger and raising dogs. I have noticed, now that I have been told, that it is true. Lady came in heat at 13 months and I bred her so I couldn't tell from her, but Autumn came in heat at 8 months and I didn't breed her and her little twat and nipples are bigger than before she went into heat. She is a year now. They don't go back to the original size. The swelling of her mammary glands did go down, it just took a while. Sylvia |