Do your neighbors not realize that this is a lawsuit, along with criminal charges, just waiting to happen should anyone in your family be attacked by these dogs! I would remind them of this. Like the others I would contact every city agency there is, but sometimes their hands are tied until the dogs are actually in your yard. We had some neighbor's dogs that did this. Fortunately, they were good neighbors. They dug a trench along the fence and filled it with cement.