I think I am seeing something on this buck that I havent seen on other bucks that have been posted on this site. Not saying it hasnt, I just havent noticed it. The front of this deer's knees look to be bald and calloused over. Here in Texas, this is something we see fairly regulary on older bucks. Most of the time the buck is at least 5 years old but usually in the 7 year old range. Alot of times this helps me in determining the age of a post mature buck that has started to have that younger looking body on him. I agree with the 3 to 4 yr old guesses on this buck. Not sure Im seeing something that is not there or not.