My dog nudges, or noses, the cat and my grandkids. He has also nipped visitor's hands on occasion and although I know it's not actually a 'bite', they don't quite see it that way and so they think he's dangerous. (I'd like to tell them if he really wanted to bite, it wouldn't be a nip. I apologize profusely instead). He also snaps at faces once in awhile, which results in a correction- a stern 'no' and pushing him away. Are these herding behaviors?