From what I've read, much of it was introduced via "Deer feed." As in the UK where cattle were fed infected feed made from diseased cattle (ground bone, marrow, brain and spinal matter) commerical game farms made the same mistake from what I understand. Penned animals may have infected outside Deer/Elk by contaminating the fence area, exposing outside Deer to infected feed or grass. The Prion's responsible for spreading CWD appears to be nearly impossible to destroy by conventional means. I hate to hear about your area fishdog, hopefully WI will be able to control it. And yes, I should have said "studying CWD" instead of controlling it. Sorry for the misunderstanding. Good hunting this year. grayghost
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