Someone riding a horse is not gonna stop and use a pooper scooper. Most horses do their business while on the move and don't look back. Even the local trail here in my area (I use it for day hikes) has bikes, horses and the trails are a mess. There are walking specific trails but no-one heeds the signs. There are trail markers that state what each trail use is allowed but bikes use walker/hiker trails anyway with no recourse. <img src="/forums/images/graemlins/mad.gif" alt="" />