Colton,

That’s a very nice buck!  I noticed that the younger buck to the left appears to have already shed and the more mature buck to the right is still in full velvet.  When bucks shed velvet or antlers is more of an individual trait than related to maturity.

The buck on the right appears to have a swayed back and pot belly. However, I believe that’s due to his posture. His neck merges with his chest above his brisket and his shoulder and ham don’t appear fully developed.  

This buck is sending mixed signals and I could go with an estimate of three or four.  When I’m in doubt I give the benefit to the buck and accept the younger estimate.  He may appear to be four in another picture.

Enjoy creation,

grant