Oh my, my heart breaks for you and your chicks!
Huge huggles!
Our beagle killed one of my babies when I first started letting them stay outside in the run. I'm thinking they were about 5 weeks old, and apparently she pulled it through the chain link. I had just finished telling someone how proud of her I was, because she was laying under an apple tree, and not bothering the chicks. Went outside to bring the chicks back in, and there laid a dead chicken right were the beagle had been laying. I spanked the beagle with the chick, but I don't think that did any good. I KNOW right now that she'd attempt to kill them again, but I truly believe it's because they run and make noise. She loves squeeky toys that make the same noise that baby chicks make.
Anyway, my oldest chickens are now HUGE in comparison to what they were, and are 10 weeks old. I'm going to take the beagle outside on a leash, and let them chickens attack her. I've seen them surround and attack my mini dachund so I know they are capable. I know I won't be able to trust her without direct supervision, but I hope it will scare her into leaving them alone. Their peck HURTS right now, and when 25 chickens surround you, like they did my mini daschund, and you're in the middle of the circle, it's gotta be intimidating! For now, dogs are inside when chickens are free ranging. Chickens are in the coop and/or run when the dogs are outside. My mini dashie is the only one that doesn't try to get the chickens. She's scared of them!