I have two dogs. My Boxer/Pitbull mix is terrified of the chickens. If they so much as look at her crosseyed, she runs with her little stub of a tail tucked between her legs. My Lhassa/terrier mix is another story - he thinks he's a rottweiler. When he growls, he sounds like a doberman on helium. He hasn't outright attacked any of the chickens. However, a pullet did manage to escape the henhouse when a horse pushed the door open. My little Lhasa did keep her standing on the far side of the henhouse, but all he did was bark at her - until she'd had enough and pecked him right on his noggin. She brought blood, and a furious spate of barking from an outraged 14 pound dog. I opened the door for her and she very graciously agreed to enter - with the little dog yapping behind her the whole time. The pullet was completely unruffled by the incident, but the dog refused to go near the henhouse for days! I do not doubt, though, that had she run, she would have triggered the little dog's prey drive and he would have attacked - but I'm not sure how much damage he could have done...
None of the categories indicate Chicken Terrified - So I would classify the Boxer/Pitbull mix as Chicken Hater but Not Killer
Same with the Lhassa/terrier mix