I'm sorry that you are having to go through this. I had the same problem with a neighbors dog who killed my chicken. I know how you feel and so do other BYC'ers. My experience with the court system was not what I expected and I have lost faith in it. I will never go to small claims court again! Here's a quick story
Dog killed my chicken...dog owner said it wasn't his dog.......got paperwork for small claims court.....filled out paperwork and paid $62.00 to file papers......paid $18.00 for police reports....paid $1.16 to get pictures developed....had to drive 20 minutes to the sheriff office......paid $72.00 for sheriff to serve court papers....missed work for trial.........the court awarded me court costs and $20.00 for the chicken.
It's not worth it. The stress, the time missed from work and then the injustice. In NH it is legal to shoot dogs who are chasing, killing, worrying etc livestock. Chickens are livestock. Find out if it is legal where you are and target practice. Once the dogs know where to get a chicken dinner they will be back. I guarantee. I'm waiting for the doggie from across the road to show up. He won't ever go home.
SSS
Shoot Shovel Shut up
I wish you the best of luck my friend, whatever method you choose, and piece of mind.