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A couple of days ago I noticed this Mule Deer buck along the way into work. He was with a group of about 10 bucks, all in velvet, but this one stood out. He hadn't shed his left antler this spring. I didn't have my camera then so this morning I went to see if I could get some photos where he has been hanging out.
I found him and another buck at the same area and managed to get a few photos. I was speculation on why he might have retained the antler, but couldn't come up with anything that would explain why an apparently healthy deer would keep an antler like this.
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After I got home and looked closer at the photos I could see the the deer was also blind in the left eye. I suspect the deer sustained an injury to the left side of his head (perhaps a vehicle collision since this group of bucks hangs out next to a relatively well traveled highway). He is also growing in a new antler that appears to be trying to form from under the old antler at the antler pedicle.
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Other than the blind eye and retained antler, the deer appears to be quite healthy.