Nice! A Vampire deer. I have done a couple of those as euros. Most people will never know that they have one. I would say 90% of the little fangs are just under the gums. For those of you that kill a buck all you need to do is trim the gum off the roof of the mouth betweet the upper palat and the back rows of teeth. That is probably the only way you will ever know if you have one. I have had them with fangs on both sides and most with only 1.
I have only seen and heard of this trait in Whitetails. Would be curious to see if it is also present in Mule Deer and Blacktails.
The taxi that did the euro on my vampire buck told me he has seen only two on mule deer, both of which had only one fang.