I find chickens can live very long (though predators and such usually stops them from reaching old age) I've never had one of mine become old at three but I can see that happening.
that is a juvenile Coopers hawk, which means it hatched this summer. watch out one of these hawks killed my beloved silkie (though this one is young so it probably is pretty bad at hunting.) it is to large to be a coopers (now I realize there sizes over lap but from the picture it looks like a...
im so sorry, losing a bird is always horrible. I can't help you with exactly which predator it was but I do know that it was not a bird of prey. I have experience with them and I do not think they would go after an already dead creature (except for the vulture) also they do not like eating in...