Iowa groups that rescue and rehabilitate wildlife must turn away whitetail deer to avoid inadvertently spreading a deadly animal disease, state officials say. The Iowa Department of Natural Resources notified 90 volunteers and groups in December that the state would no longer give permits to groups that rehabilitate whitetail deer, most often fawns. The state wants to prevent the spread of chronic wasting disease, which has been found in wild deer herds in Allamakee and Clayton counties in northeast Iowa. The state says the rehabilitation work could unknowingly spread the disease to other deer that are treated at the centers and later released into the wild.