Yeah, he needs to see a doctor even if the dog has had its shots. My husband got in the middle of a spat between our dog and our friend's dog, and the friend's dog bit him on the hand. It wasn't an awful bite, and she's not a bad dog and she'd had her shots, but he went to the doctor just because it was in a delicate spot on his hand and thumb and he was worried about ligament damage. He wound up on antibiotics and got a lecture about all the nasties you can get from a dog bite that results in a deep puncture wound. And even with the antibiotics it took a surprisingly long time to heal.