At work, something is killing our waterfowl. I have a couple of guesses, but since no tracks are visible, I cannot ID.

The birds are always killed by a hard bite to the neck, not the head. Then, the feeding signs are skin pulled away from breast and lower neck, breast meat eaten from the bone. Th bones are intact. The viscera is always intact as well. The head [a favorite of many carnivores] is unmarred.

So far, the birds killed are large geese. A few stray ducks [they refuse the shelter of their pens] get killed. Usually, where 2 geese ae present in a pen, BOTH are killed, but only one is eaten, or rather, partially eaten.

Has anyone ever had large birds killed like that. What could have done such a thing?