Excellent. I certainly have a lot of them. They don’t seem to be interested in attacking the chickens. I think they were defending their nest maybe when they saw off the hawk.Crows are good to have around. They will pester anything they think is a threat and drive them away. They live in family groups, patrol and see much of everything, alerting every other crow in the area to what's going on (probably all relatives) and are very alert to any of their predators - hawks and owls, but even climbing predators. I have seen them mobbing a raccoon who was merely napping on a low pine tree branch.