excuse me uhhmm to lobohawk, I think eagles shatter their own beaks for survival and pluck their feathers because the feathers of the eagles at maybe 30-40 years it will be much heavier and it will be very hard and difficult for them to fly and they shatter their beaks because their beaks don't grow straight, it grows pointing the heart of the eagle so if the eagles turn 50 years old, they can die because their beaks are sharp and it points their heart.. And also, the one you just said earlier, uhhhhmmmmmm, we cut our fingernails for new ones to grow isn't that right? But for the point of view of the eagles, they can't just shatter their beaks after a month or two just like our fingernails so they do it when it's really abundant (at the age of 30-40). lobohawk, try not cutting your fingersnails for 30 years and we'll see what happens... I'm sorry. I just want to correct what is wrong...=)