[erroxiainsona]

I would just call animal control on them. You've already talked to them and they KNOW they're off leash dogs are posing a problem. And not just to you, either. Their dog probably does it to every dog that walks by with their owner. Since you know the laws and know that their dog may pose a threat to other leashed animals in the neighbourhood, I would just call now. Animal control probably won't take their dogs but they will talk to them and even give them a fine. That should *hopefully* be enough to get them to chain/fence their dogs.