A lot of corn fed deer from the midwest get pretty big, if they are given the chance. But, usually when you see a total cow, it came from canada. So if they say that deer came from anywhere other than canada, I would definately agree that it was some kind of pen raised deer, that had an unlimited supply of high protein feed. Thats what happens when deer dont have to travel to find food and mate, and they have an endless buffet of meat and taters.