I'm not gonna read back but I believe it was said this dog has killed OPs birds 2 or 3 times and attacked a dog on their property?
Seems some steps were taken by the owner but those have now been abandoned.
I'm thinking that neighbor and I are already passed having a good relationship.
Anyone in your household that could?
Animal control doesn't sound like they're gonna do anything. Owner surely isn't at this point. It's up to you. You can jump through hoops and spend time and money for something that may work or you can be done with this.
This hasn't been a one time occurrence.