You can be mad all you want....bottom line though, is, your chickens were not behind a fence. The dog owner may be in the wrong, but that isn't going to bring the chickens back. If you want to protect your birds, you need to fence them in , or do not let them out unless you are going to be with them. Even then, you may not be fast enough to prevent a tragedy. Yes, you were in the right and the dog owner was in the wrong. That being said, the chickens will be just as dead the next time, unless YOU protect them. And don't get me wrong, I do have sympathy for you. I had a neighbor's dogs come onto my property and kill 3 beautiful half-grown silkies I had last year. If I could've caught them in the act, I would've shot them without hesitation. And I would've been well within my rights. Around here, a livestock killing dog gets no mercy. (rural georgia). However, my chickens are just as dead. Either fence them in, or fence them in and buy a gun.