No, they'll try again. Otherwise within a couple generations ,you could have a whole hawk population that never preys on chickens. Remember, even hunting 'natural' prey, hawks (and especially juviniles learning to hunt) don't have a perfect success rate. If they stopped after failing each first hunt, they'd run out of food options. Remember that whole 'if at first you dont succeed, try, try, try again' lesson we were always taught as children?If that first attempt goes wrong then that hawk will never be driven to hunt down a chicken again.