If you have a degree in wildlife management then surely you know the only way to correctly age a deer is by looking at the teeth (how many and the wear). There are also some internal developements that occure during the life of the deer that are used. Antlers will change from year to year depending on mineral and nutrition factors. There is a direct corrillation between a deer's health and antler growth. So aging the mount is a muet point, unless there are some biologic samples left, and after 13yrs I doubt that's possible. As far as body weight goes an individual buck may gain or lose up to a third of it's normal body weight in a single season. A buck's, at what we call mature 3 1/2 to 7 or 8 yrs, body shape will also give a clue. Younger bucks have a more sleek streamlined abdomin{sp} where an older Buck will normally have a paunch. I said normally and this agian depends on health and what the deer have been eating. Hope this Puts some light on it. If you have any pictures of the whole deer that might help.

Misplaced Buckeye