No pain. Extremely athletic dog with OFA prelims that show excellent hips. Really confusing behavior that is inconsistent with her personality. I had heard that sometimes during adolesent stage there can be a little stress behaviors that show up for a while. She's had her first heat cycle about 2 months ago, but still very much a puppy in her demeanor. She never is left alone really, but that's an excellent point. I'll make sure to monitor who she's around.

Thanks for the reply.