Most of those you posted are just young deer. The only two ways to know for sure on age, are either with history or ear tags. Teeth are notoriously incorrect. I know a lot of y'all mentioned using the teeth, and even using the cementum annuli process, but the bottom line is teeth are a horrible way to correctly age a deer. I've been doing this a LONG time and have just seen it too many times on known aged deer. We kill a lot of known 8-10 year old deer and their teeth will almost always show 5-6 years if you go "by the book".
Trying to age deer in the summertime is almost impossible. They ALL look young. They ALL have skinny necks. Usually by October or November (Texas hill country) they will start to more accurately show their age. Keep in mind, nothing is 100% when aging on the hoof. Not all bucks will get a sway back, or a pot belly, ect. In fact most don't. Here are some pics of a buck my son killed back in October. Notice the white ears. We watched this buck since he was a spike, back in 2015. Actually, we are not certain if it was 2015 or 2014, so to err on the safe side let's say 2015. That would make him 8.5 this year. There is NO denying it is the same buck. He was a fixture on our lease and a fun deer to keep tabs on all those years. Oh, and his teeth showed 5.
The first pic was from September. Most folks would age him at 5 off that pic. Very typical for a deer of this age. The last pic is obviously from back when he was a spike...8 years ago.
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