No not the deer, the woodworking kind. If you are going to have a bunch of dados to cut with your router, fabricating cabinets. bookcases etc or do projects that need dados here is an adjustable dado jig that uses the work stock and the cut lines to place the dado with no measuring other than to mark the location. It involves some hardware and some time to make but the payoff is accuracy all the time. The jig is shown in a vid from FINE WOODWORKING.
http://www.finewoodworking.com/2012/04/ ... -thickness