The law should be like driverless cars, you are responsible for the animal. If your dog does something to cause injury and you haven't done everything possible to prevent it, you get charged as if you did it yourself. If your dog gets injured because of something that could have been prevented, you get charged (similar to child endangerment). Link would be fine as he had made a reasonable effort to create a safe situation. This gets rid of the stupid muzzle law or restriction by breed. You are responsible, if your dog is bitey, use a muzzle, if you are the dog whisperer, don't.