We have dealt with this ourselves. Per regulation you cannot let your dog run onto others property without permission, if they are running deer it is also illegal and if you have pictures of it the ECO should be writing tickets. This is right from the syllabus: Hunting dogs should remain under control of the hunter or trainer, especially on lands inhabited by deer. Do not allow your dogs to pursue game on any posted land without the landowner’s permission. Do not shoot dogs; report stray dogs to a local Environmental Conservation Officer or your local animal control officer. I would be calling the ECO or his boss, they should be enforcing the law.