And how do you think that that mighty eagle learned how to strike that rabbit perfectly in the first place? Or do you really think that that skill was available straight from the birth?
I have seen many kittens misjudging their jump from couch to couch, chicks misjudge their ability to fly already and fall out of the nest, grown horses misjudge their jump and break something and so on and so forth.
Animals make mistakes, just like humans do. And sometimes these mistakes cause them to break things. Or worse.