I've been carefully watching Fraser during greetings with other dogs. From time to time he is on the receiving end of warning growls and snaps from other dogs he is greeting and I've been puzzled why things seem to go downhill from what looks to me to be a normal beginning. As far as I can see, the beginning bits are normal--careful approach, no direct eye contact, ear sniffing, taking time with things. It looks as though when he thinks it's okay, he goes for sniffing the groin area and is growled/snapped at. Is he misreading other dogs' signals? Is he going in to sniff an area he doesn't really have clearance for? I only ask because it seems to happen to him fairly often. Even trotting past other dogs on the street, he'll often get an aggressive display from another dog when he's not doing any much other than trotting past on his walkies without paying much attention to them.