Yeah. I'm thinking something else killed the hen. Was your dog very aggressive toward the hen?
I don't know what makes you think that, but I assure you that it was the dog. He's done it before.
Sorry for the loss if you hen.
As for the dog, bad doggy. Actually I'd have done away with it if it were mine. I cannot stand a chicken killing dog. I know though folks get attached to their dogs so it can be a bit if a decision to make on that.
Levi (the dog) has been with us for *11 years.* We've only had chickens for 2 years. Before we moved to the country, he happily hunted groundhog, possum, and birds in our tiny city yard. I'm not going to put him down or get rid of him for not understanding that he can't eat chickens. He's old, he has a heart condition, and he was with us first. My dog is a pet. My chickens are not. There is no decision.