We had a similar experience. I came home one day to see a hen and a hawk in the run, and the six other chickens missing. The hen had a gash in her head, but was still alive. We chased the hawk, which was very reluctant to leave. We searched for the other hens everywhere. Finally, i noticed a...
I e never heard of the buzzards killing. We have tons of them here and sometimes it appears they communicate with my chickens. I think they help my chickens look out for hawks. The buzzards are nothing to fear.