i was out scouting with a buddy of mine the other day and found the right lower jaw of a deer and picked it up and brought it home. my first thought was wow this must have been a yearling because all of the teeth were pretty sharp, but upon further research i found out they are actually from a 2 1/2 year old deer. i was surprised how off i was, and decided to start a collection of deer jaws to make my own guide to a deers age. it may take a few years, but it'll be a good management tool to have. as of now my collection consists of the 2 1/2 yr old set i have now, and possibly 1 or 2 i may be able to dig out of our dump up north. any of you guys use similar things? ik there are some really nice plaques w/ all the teeth available from whitetail institute and other places.