Oh, this is an unpleasant thread that we have to deal with. Fortunately, I have not experienced it yet. But my husband had a sad story when he was a teenager. He was tending a rooster that he used for playing cockfighting with his friends. He keeps the rooster in a makeshift wooden cage. When his uncle gave them an adult german shepherd dog, it did not occur to him that a dog and a rooster do not mix.
After some weeks, the rooster in the cage and the dog in a leash, the dog was able to get loose. When my husband heard the sound of the rooster which was in the frontyard, he rushed to see that the dog was holding the dead rooster in its mouth. I'm sorry if I cannot continue with the story but I guess you all know the conclusion.