Dog running loose and killed all our chickens, animal control won't call back, what do I do?

A dog jumped our fence and broke into our chicken runa and killed each and every one of of 10 chickens. Caught the dog, called the owner, she agreed to compensate and gave us a check, which was unsigned, and we were too upset to notice. She of course now won't pay.

Called animal control 3 days ago, no answer. Called a few lawyers and no one deals with dog-chickens, only human injury. I checked our neighborhood association posts and this dog was loose many times before, found and returned to owner. It's not only dangerous to other animals but also itself can be hurt by cars, etc. I don't think that the owner is fitting to have a dog but animal contro is not doing anything. Shall my birds just dye in vain? What can I do??

Also, I spend hours look up Texas laws on dog killing chickens. Yes the owner shall be fined each time the dog runs at large, and there is livestock law, dog restrain rules, leash law, etc. How do I get these laws enforced if the police says that this is a civil matter, they do not handle it, and the animal control won't call back? We live in Austin, TX. Any advice/experience of similar situation appreciated. 

Thank you. This is my backyard, we live in the city, so no one will see the sign but the dogs. We are thinking about good/better fencing too. My question is, how do I get the current matter resolved? The dog is still living in our neighborhood, and I doubt the owner will do anything about it running loose all the time. 

Yes we have pictures of the dog in our run with all the dead chickens, and neighbors' postings on our association website of this dog being found before. The owner gave us a check, which was unsigned, we were too upset to notice. so, that's the story. We just want justice to be done so our birds are not just killed in vain.

Yes her reply was that she is not familiar with writing checks. (She is 24). And she said that there is no point to pay since we told her honestly that we have called animal control. We do have the check. I agree that the dog is untrained, and it is the owners fault to not keep it in safe confines, safe for others and the dog. I really hope animal control will take reasonable action. We are so sad about our birds. It was the worst thing to come home to, a happy dog and 10 dead girls. And that lingering feeling of death surrounding does not go away easily.