I don't think it's shampoo--some critters eat hair. One of my horse friends had a young filly who got colic from eating half of her mother's tail. Not chewing it--EATING it. This is a well-cared for horse on pasture in a well-managed herd. But she still ate her mama's tail.

Good luck with all the juggling. And I sure understand that Twitch. I have it sometimes after spending the day with difficult kids, especially if I've also had multiple IEP meetings.