Watch out with the saying "hey" part of agility. My Tim ran thru the tunnel all happy and stopped by to say "hey" to a sheltie who promptly went "cujo" and hung onto his ruff. Poor Tim fell over trying to get away. I had to grab Tim and haul him away as the sheltie was on a leash but the owner was too freaked to actually jerk his dog away. Proper socialization would be a good thing and if you have an attack sheltie, please stay away!!