Vultures do not have talons to grip and swoop down and take a bird, so how are they going to pick one up with their feet? They peck. Of course I guess they could stand on their prey and hold them down. It's not out of the realm of possibilities. My 6lb yorkie it couldn't catch though.
I would need proof of seeing them swoop down and kill a chicken.
They peck defenseless animals to death, hence the newborn calves and ewes, even the mothers who are giving birth are defenseless to them.
https://apnews.com/e79711967910490db3368c1339545e47
I have lived in the country for 30...
I have heard of black vultures attacking baby calves unable to move but most chickens can evade a vulture, I would think. They are not like hawks who swoop down and grab their prey. They peck the baby calves to death. Ewwww however a chicken is not going to stand there and let that happen.