just wondering if anyone has any advice: My beautiful and otherwise loving Standard has developed over the last six months some not so friendly behaviours towards other dogs. We have done several obediance classes, so it is not that he hasn't been exposed to other dogs. I find it is especially when he is on leash. If he meets another dog, he is fine until the dog wants to sniff or especially gets in his face. He has snapped at other dogs. The obediance instructer said that he just needs exposure but I am finding it difficult to facilitate that, as I am afraid that he may bite another dog...any suggestions how to get him over this!!