Eagle owls hunt foxes for example. This dead fox was found in a wild Eagle Owl nest, and researchers allowed a trained owl to attack it to illustrate what happens naturally.
http://news.bbc.co.uk/earth/hi/earth_ne ... 585931.stm
http://i1195.photobucket.com/albums/aa398/Frikkie3/_47531982_4_vpenteriani1_zpsdf747e02.jpg
