No. Take those photos immediately. When you call animal control and show them the pictures and tell them what's happening, they will issue him a citation. He will need to fix the problem with a certain period of time or be fined. They may also ask to see a dog license and medical records. Maybe. Tell them you're calling before anything more serious happens. I know it's tough to live next to someone you're reporting, but, he'd do the same to you. Believe me. Safety is the key. His dog doesn't have permission to be on your property.
Not everyone is a good dog owner and you shouldn't be the one to pay the consequences.