Archery deer hunting season is under way and the Department of Natural Resources is collecting carcasses for chronic wasting disease (C-W-D) testing. D-N-R wildlife health section chief Tami Ryan says the large scale sampling that takes place during the deer hunt is one of the best tools they have to track C-W-D. She says the testing on deer heads is a major part in fighting the spread of the disease and gives an update on the health of the deer herd. Testing facility drop-off sites are located across the state and are listed on the D-N-R website. The bow and crossbow season opened Saturday in Wisconsin.