I don't know mate, Iv got 3 dogs one can be funny with some dogs apart from lurchers for some reason, the other two love dogs n just want to play with them, but I don't have any probs either way as without thinkin about it I just don't let em off near or were there could tend to be any other dogs about, if say for excample I go the beach I won't let em off until I'm well out the way, there all really obedient but it's inevitable if they see another dog they will want to go n play especially the pup n I can't be arsed goin after em plus the other person seein a greyhound type dog or two boundi