Something keeps killing my ducks... 1) they are in a 4'+ fenced in area w/ pond. so whatever it is, is either climbing or flying over 2) Both ducks were found headless. The rest of the body was hardly touched. The first one looked like something had tried to pull it through the fence. The second one wasn't near the fence. The head was completely gone, no bill left or anything... 3) the second one still had plenty of food in her crop. (it was torn open) How long does it take for food to digest? Thanks for your help.