I have one dog i’m Pretty sure is part coyote, we were worried about her before we got chickens. She turned out to love the chickens and would even herd them around the yard, she even had a favorite one and would literally play chicken with it. The other more docile dog we have turned out to be the issue, he was literally salivating the first time we ever brought home pullets. We kept a close eye on him with them, but eventually one day one of the dogs dug into the coop and released the chickens and 3 were killed. We’re 99% sure it was the dog that had salivated over the pullets... We tied one of the dead chickens around his neck for a day and he got the message. Now he just walks away or looks away whenever the chickens are out and about.
We just got a rhodesian ridgeback puppy so we’re a little worried as they are hound dogs and he has already exhibited some pointing. He has chased the chix a couple times but he seems to understand they’re off limits. Regardless i think it will be many months before we allow him unsupervised time with the chickens when they’re freeranging...