For the love of...peanut butter?

Bug just told me that baby girl told him that her BFF Jenny told her that peanut butter is made out of horse hair. For the love of god my friends, please tell me there is no truth to this. I simply will go right over the edge if I find out that I have been feeding my children horse hair every living day of their lives. Please relieve me of my mounting anxiety. Please... I'm begging you!