I will agree it is a lot more common with whitetails. I got these two years ago. Unfortunately, there was no way to save the one that was still alive, so they are now on the wall, still locked together.
http://www.msnusers.com/arizonahuntingitems/muledeeronly.msnw?action=ShowPhoto&PhotoID=162
I tried to show this photo from 2 MULE DEER in arizona that were locked and died. I got it from the former game manager in unit 10 mr tim penders last fall. some archery hunter found them and after showing the warden he owns them now. I could not get the photo to load because it kept telling me the file was too large, I don't know what/how to fix it so use the link I guess. thanks.
M WAITE, AZ.