Stacy, I think that is a wonderfully done photo!
I love the black background; it reminds me of the photos of mounted specimens I would see in the Jonas Bros. taxidermy catalogues I would page thru as a kid.
One thing that seems a bit awkward is the way the base seems to be floating in space. But I realize that you are shooting for them, and must do so to their specifications, and probably have little choice in such matters. They could easily crop some of the bottom off, so that the very bottom of the base is not seen........if such is the case, then it's certainly best for yu to have photographed it as you did, so as to give them more to work with.
Is this a Rocky Mountain Bighorn, or a Cali Bighorn? I realize that your area has the R.M. subspecies, but I ask because the characteristics of the horns are so much like those of the Cali bighorns that roam around here in eastern WA.
"Your" and "you're" are different words with completely different meanings - please use the correct one.
"They're", "their", and "there" are different words with completely different meanings - please use the correct one.
"Fare" and "fair" are different words with completely different meanings - please use the correct one. The proper expression is "moot point", NOT "mute point".