Antler Growth in White-tailed Deer


Testosterone levels control just about everything on a white-tailed buck, including antler growth and development. During this time of year, a buck’s testosterone level is quite low, but those levels will begin to increase as summer comes to an end and the fall season rolls around. Testosterone levels will peak just prior to the rut. It is during that time when bucks become very aggressive towards one another, establish breeding dominance, and prepare for the rut. That time of year can be rough on a whitetail buck.

When I received this photo of three white-tailed bucks in my inbox a couple weeks ago, the sender wrote that the deer on the left and the right (in the photo above) were bucks. I zoomed in for a closer look and noticed that not only two, but that in fact all three of the deer were bucks. And the photo makes sense because whitetail bucks have low testosterone during the spring and summer, and they can stand to be around one another. This is the reason for spring and summer bachelor groups. Furthermore, does tend to be more solitary leading up to fawning season. Does will not associate with bucks, or other does for that matter, until several days to a couple of weeks after the fawns are born.

Whitetail Deer Management: Three whitetail bucks take a drink on the outskirts of Houston

There are other reasons, besides low testosterone, why bucks will not fight very much during the spring and summer. It is because their antlers are quite fragile. Growing antler material is basically is pre-formed cartilage, so trying to fight each other while in velet would be like butting their noses together. It would not feel good and there would be lots of blood. Bucks, even with velvet-covered antlers, still have minor disagreements. They, however, settle these spats by standing on their hind legs and using their front legs to kick in the same manner that we often see does fight. Bucks will only fight in this manner when in velvet. Once their antlers harden, it’s on!

Whitetail bucks change drastically between spring-summer and the fall season. With rising testosterone levels, antlers complete their growth and bucks are spurred to rub off the velvet. This rubbing activity creates several noticeable changes in a buck’s body. During the spring and summer bucks have doe-like necks. With no antlers to rub–and no one to fight–their neck muscles shrink down. However, increased testosterone and antler rubbing soon condition a buck’s front-end and neck into a fighting machine, typical of what most hunters expect to see during the hunting season. This conditioning helps individual bucks compete for does and helps them submit does, as well. After all, during the rut hunters often see does running away from the bucks!

Whitetail bucks change drastically between the breeding season and the “off season.” These physical changes, in terms of their body and antler growth, are related to an individual buck’s testosterone level. Bucks have low levels of testosterone during the antler growing period and high levels of testosterone just before and during the breeding season. These physical changes can make it difficult for many hunters to age deer on the hoof during the summer months, but whitetail bucks quickly whip themselves into shape for the big show as fall approaches!


 Subscribe in a reader

2 Replies to “Antler Growth in White-tailed Deer”

  1. I have a neighbor here who claims a spike buck from last year is now an 8 point. Is that possible? Bandera, Texas

  2. Gil, anything is possible. The odds are that most spikes will become 8 point deer.The number 8 is very popular with whitetail bucks, especially since research has found that yearling bucks with few antler points tend to grow up to be old deer with fewer points than yearling bucks that started with 6 or more points.

    The spike in question may have had horrible nutrition the previous year and his antlers may have reflected that. They don’t typically “bounce back” after a slow start since the first few years impact future growth a lot. So it could be an 8 point, but I’ve seen both big and small 8 point deer. Or, it may be a different buck completely. In deer management, managers are tasked with managing the herd, not necessarily for individual deer.

Leave a Reply

Your email address will not be published. Required fields are marked *