Sadly while cooking and allowing the chicks to enjoy the heat of the spring here, I heard my dog snarling in the backyard only to find him fighting with a coyote that had broken into our yard. He made out with one of our chicks and injured another one however the injured chick has since recovered and is doing well after i've treated it.
I've since reinforced the fence it managed to scale and re-equipped my dogs spike collar, I ask you keep the chicks in your minds.
Sorry you lost a chick. Hope the reinforced fence keeps your flock safe from further attacks.