Approach your neighbor in a non-threatening way and say you hate to introduce yourself this way but I need to let you know your dog killed my chickens. Maybe, just maybe, they will apologize and offer to compensate. If they don't then let them know the value of your birds and how much it will cost to replace them. If they don't offer to compensate then...then you know what kind of irresponsible neighbors your dealing with.
You can call local animal control or set a live trap and trap the dog and take it to the dog pound and your neighbors will have to bail it out if the want it.
But no sense in starting a war with them because this day and age people are crazy and it can be dangerous. So reinforce your chicken coop and what ever else you have to do to keep them safe. If they continue to let the dog loose there are certainly creative ways to make it disappear without yourself becoming a target for abusive neighbors.
You can call local animal control or set a live trap and trap the dog and take it to the dog pound and your neighbors will have to bail it out if the want it.
But no sense in starting a war with them because this day and age people are crazy and it can be dangerous. So reinforce your chicken coop and what ever else you have to do to keep them safe. If they continue to let the dog loose there are certainly creative ways to make it disappear without yourself becoming a target for abusive neighbors.