Every time I travel Rox with my friend's gelding, she comes out of the trailer with her neck looking like she's been attacked by a zombie. (Well, not THAT bad, but bloody.) It's weird as you can't see the shape of the mouth like you usually can with a bite mark, but there are lots of small rips in her neck. There are no sticky-outy bits in the trailer that she could be hurting herself on - and it doesn't happen when she travels alone or with my other friend's horse - so I've concluded that my friend's gelding is biting her. It's weird as he seems to really like her. What is with that?