How Can YOU Tell... May 22, 2007 20:37:01 GMT -5 Quote Select PostDeselect PostLink to PostMemberGive GiftBack to Top Post by twosuperstudponies on May 22, 2007 20:37:01 GMT -5 #4. You know it's going to be a bad fly season when your horse is biting her sides, kicking her belly, swishing her tail, rubbing her butt and rolling and she's NOT pregnant!