I would absolutely be calling animal control. This man had no right to have his dog off leash in a public area especially if it is dog aggressive. The fact that he yelled what he did suggests he knew exactly what the dog was going to do. Whether they can get money for your vet bills or not, I have no idea but they should have the bite on record and go talk to the man if they can. If the ACO there is like ours she will probably be knocking on doors asking who owns those dogs. Good luck to little Ozzy, I hope he recovers quickly. That is a scary thing and I hate hearing such stories so darn often. WHY CAN'T PEOPLE BE RESPONSIBLE WITH THEIR DOGS?