Thanks guys.
As you can see in the trail cam photo on 10/1, he was pretty thick in the neck and everywhere else. He was getting a little rutty though. Ran with a doe and her fawn mostly the last 10 days. As recently as Friday, he would tolerate several other bucks around the feeder...so long as he was alone. If there was a doe present, he'd chase the others off. The less mature bucks on our place were still bachelored up as of last weekend.
Interestingly, this deer ran with the one my brother shot last rifle season all summer that year. I believe both were 3.5 last year, but brother's deer had a little bigger body and MUCH bigger rack. We had zero pics of my son's deer in the months between July and late December. He apparently felt comfortable setting up shop with his buddy out of the picture.
Deer are interesting.