I am so very sorry. I would talk to the dog owners and if they aren't going to replace your chickens I would take them to court. I would also set up cameras (security or game) and make a record of the dogs being on my property. If it continues I would take my proof to the local dog warden. If that doesn't work, well I would load them up and take them to a shelter or shoot them. I am a dog lover - I have a 160 lb Leonberger and a 65 lb Australian Shepherd mix. Neither is especially used to poultry but we are working on it and I always have my poultry protected just in case. My neighbors across the street and behind me both have chickens (and have for almost 2 years) and my dogs bark at them, but have NEVER gotten out of my yard. It's MY responsibility to keep control of my dogs. My yard is fully fenced and they are not out unattended. If they did escape (which - we've lived here for almost 12 years and have always had very large, protective dogs and have NEVER had an escape - not a single one, we are extremely careful) I 100% would pay to replace whatever they injured, killed, or damaged.