Take him to the vet?

Yesterday we had a family bbq over at my uncle's and there were about 4 dogs there (including Tyson). There was a scuffle later that night between Tyson and one of my cousin's dogs. I dont know what set them off because we blocked the dogs off on their deck but Tyson jumped over the barrier and when I brought him back in, the fight broke out. Anyway my cousin and I separated them and then they were fine again (they were fine all day). Anyway today I noticed that there was a slightly dark spot on Tyson's face, about 2 inches from his eye and it turns out that the other dog may have drawn blood. It's a really small injury and there wasn't enough bleeding for it to be noticeable. I cut away some of the fur around the area, cleaned it up with water and hydrogen peroxide and applied neosporin to it. Thankfully its in a spot where he can't lick at it. I'm wondering if I should bring him in to the vet? It's a little less than 1/2 cm long and its not deep at all. I called my vet to see if I could just pick up antibiotics for him but he can't do that unless I bring him in. Thanks. This is the first time I've had to deal with something with this. I guess the biggest concern here would be infection.