Should I confront this guy for hitting his dog?

No, leave it alone. It doesn’t sound like he was actively abusing the dog so stay out of it.

NO, definitely NOT!!!

Pick your fights.
This isn’t it.

If he tapped the dog on the side, it might be remind the dog to be quiet.

Please, @Cindy1302, stay in your own hula hoop, as they say. While you’re busy supervising everybody else, no one is paying attention to your stuff. Your own stuff needs your attention.

I forgot to mention I think its a puppy. Not like a newborn but it’s probably 5 or 6 months old

Nope. Maybe volunteer with people who need your help, sounds like you have too much free time.

I strongly suggest seeing a therapist. It sounds like you need some direction in discovering who you are, what you stand for, and how to make your own decisions.

No. It sounds like he just smacked the dog to get its attention. Never, ever confront anyone for anything that they could take offense to and hurt you over.

@Cindy1302 why did you add the details? Do you think it would change anything?

I don’t think I need to add anything else. Just listen to the advice of others.

I think it only depends on how hard he hit the dog. However in your case, you don`t want to confront because it sounds like he was only doing it in a light way, not hurting the dog. So I say NO, don’t do that because you may end up in a worse case scenario.