That responsibility is on you. I indicated what I would do if holding court on this case based on information provided. It is easy to see judges can vary greatly based on passed judgments resulting in their having reputations going one way or another as a general pattern.I would love to see one example of that. Any links to such a cases outcome involving reduced compensation for owners lack of providing adequate protection?
Like you you have indicated about yourself, I have kept chickens for a while. I protect my birds, even free-range. If dogs defeat my efforts, then in all likelihood damage done to more than just birds. Then additional cost would come with those damages.