Hawks and other raptors strip off thin strips of flesh and eat them much like a child slurping spaghetti off of their dinner plate. This results in a corpse that may still have a fully articulated but flesh-less skeleton. Also because a hawk will often begin feeding before your hen or rooster is dead there are usually several feather piles, one where the capture first happened and additional piles of feathers and down were the chicken struggled to get away but the hawk maintained physical control over your chicken until either blood loss or shock ended your favorite chickens' agony.