Free: Contests & Raffles.
It's easy to tell if they are cross bred. The other pure breed's are mean to 'em
I have looked into this for one of the classes I am teaching. Statistically, you would have to breed 100 whitetail bucks to 100 muley does to get one pregency to come to term (doesn't usually work the other way, whitetail bucks are agressive enough to breed muley does, muley bucks generally arent...). Then, on top of that the offspring are usually so fragile that they don't survive a year. Every once in a while a bona-fide cross pops up, but most suspected cases are just mistaken identity...
Frost bite, predator, damage in fighting...YES! Reemmber a whitetail has a complete different tail structure than a muledeer.