My big old lurcher dog was like Buck, would just wag his tail at other dogs, and was content to pish all over someones leg if they stood still long enough, anyway one day when an aggressive Dalmatian tried to have a go he tipped it straight on it's back then let him run away, woman owner didn't seem concerned at all when her dog was running growling at mine, her mask almost fell off when she seen her spoilt pooch get his bell rang