Nope,.a full grown guinea would have to be eaten on the ground by a goshawk (old english for goose hawk) or possibly a red tail but the size diiference makes red tails unikely for anything but young guineas. As @Mixed flock enthusiast said, a feather pile some where is your best bet. As your guineas keep free ranging farther it gets way more problematic finding evidence. And on your other post about eggs, the same goes for their free ranging habits,harder to find. I have found like @R2elk said, you have to follow them as soon as they leave the coop. Good luck.do hawks just grab them and fly off