We have a similar situation here. Idiot neighbors on the corner with an unneutered pitbull that has charged me in my own driveway. I told them to either control their dog or I would. They still haven't put up a fence, sadly. I now walk our dogs wearing a revolver.
When we first bought our property, I fenced it with pig iron fencing - which is strong enough for our birds and dogs. Its not, however, strong enough for our neighbors two new dogs. They own three unaltered dogs, can't be bothered to fence the whole 40 feet across the front of their property and keep their dogs on leads long enough to reach our fence. So we now have three aggressive, barking and snarling dogs lunging at our birds. One of these days, one of those dogs will come through the fence (its already ripped free of the lead) and I'll be waiting with a shotgun. Until then, we keep trying to convince the owners to tie up their dogs elsewhere, build kennels, put up their own fences, etc. not to mention control their 24/7 barking of their three dogs. Unfortunately, the idiot husband is convinced that letting his dogs lunge and snarl at our birds will make his dogs better hunters. *eye roll*