I can understand that a vet should get annoyed getting called out in the late pm to fix a wounded dog. It can't be compared to you calling the docter late if you are sick. If the MD is called late to deal with an accidental car wreck, that is his job and responsibility. If he has to repair some dipsh** who got drunk and rolled his car, he has a right to get annoyed. It's all a matter of responsibility.
As for a repeat offending dog, take care of the problem. After warning the owner take care of the dog. If he doesn't go quietly.....boom!