I am very, very skeptical of the account given. Notice party holding hawk was hiding face; he probably knew to do so. My chickens are very similar to those OP of that thread indicated were involved with exception mine are game. When the chicken is on the attack, it can handle something like a Coopers Hawk very well and likely kill it will such a hawk that cannot get away relatively quickly. I have seen such a sequence in person and seen them on internet as videos although most appear to have been taken down. A Red-tailed hawk like in the thread linked is a much tougher customer. If the hawk can not get away and not fight back with talons, I have no doubt the rooster can kill that hawk as well. The problem is the hawk, even with damage like a broken wing will employ those talons. If the hawk is for some reason in ill health or more seriously damaged already I can see a rooster finishing it off. I have tangled with larger hawks and owls several times so have a good handle on how they try to defend themselves when grounded and on the defensive. The chickens that might attack such a predator will be scared themselves and act very differently relative to how they assault another chicken. All the hawk has to do is grab chicken with talons and hang on until chicken realizes it has lost the advantage. At that point the chicken will try to get away and likely not come back for round two. If more chickens involved, then outcome may swing back towards advantage of chickens, but I have not witnessed such an event.
