We used to have a rooster named Hank (above), he was friendly only to me, hated everyone else. He made a great father and a great leader/protector for the hens. But he was very weak, he may not have seemed it, but he lost every time another rooster challenged him! (We got rid of the roosters...
So I have had various instances where my chickens have been attacked by stay dogs. My chickens aren’t free ranged, but I’ll let them out into my yard when I’m watching them, and I’ll go inside for just a few minutes and come back out to find stray dogs attacking them, this has happened a few...