My Max loves all dogs(people too) and thinks everyone wants to be his best friend. He is especially cray over my brother's female Great Dane, Littlefoot, who wants absolutely nothing to do with him. It's so funny to watch him w/her. He tries so hard to get her attention but she's playing hard to get to the hilt. My older boxer, Tyson, only likes people and his toys. He does tolerate Max and is not aggressive towards any animals, but if there's something to chew on or a ball to chase, he could care less about other dogs.