Intrusive Rooster!

Hey all! I reaallyyyy need some help here!

I live on half an acre of land in a neighborhood of half acre lots. My neighbor has a rooster and hens that he allows to free roam around the neighborhood and, as a result, my back yard. I have one mature hen, 8 pullets, and one cockerel. The little ones are still too young to free range without constant supervision so I keep them in the coop while the hen free ranges. My neighbor's rooster is always getting into our yard to try and mate with our hen and to lure her away, which he has done both successfully. I'm afraid that when my cockerel is old enough to free range the rooster will kill him and the pullets will follow the rooster off my yard.. I will NOT be very happy if that happens. Also, I have dogs. I have taught my dogs not to bother my chickens but apparently, to them, the curriculum didn't include other people's chickens. My dogs have killed one rooster of theirs already and have attacked their current one TWICE! The last time being this morning. How stupid does an animal have to be to come back?? The rooster survived today's ordeal only getting a bit bloodied up from having his regrowing tail feathers ripped out again. If this continues I'm sure I will find a dead rooster in my yard. My neighbors have no regards for their chickens well being! Their hens lay their eggs everywhere, I do occasionally find a hen dead on the side of the road, and they roost in a tree in our neighbors backyard. What can I do??? And will allowing my cockerel to mature keep the rooster off my yard?? Since attack dogs don't seem to work. Thanks!!