if your seeing as many coons now as when hes was locating then i dont know why he stoped locating. ive seen dog that wouldnt locate when they wasnt sure of the tree and locate when they were sure. it has been hot here in tn. my dog dont tree near as hard in this hot weather, but as long as she barks enough for me to find her i dont care lol. i dont run my mouth near as much when iam hot either.