Has anyone else had issues with their dog? Our mini foxy is getting old and we have gone for months now trying to teach 19 month old ds to be gentle when patting him. Was ok for months but just tonight ds leant on the dogs back and the dog snapped at ds. No damage done but I'm worried that one day it might be worse. Dog is normally outside but we let him in every so often. Ds and dog are ALWAYS supervised. Any ideas?