Alright, you asked for it buddy! The horns - are they ridged like a goats or are they fur-covered and smooth like a deer or an elk? Does it have teeth or does it filter its food from the water? I'm sure I'll come up with more.
Well on that I can most certainly help you. I did some work at a local animal sanctuary recently and among the species were pachyderms. It's pretty easy, once you know which flaps of skin are supposed to be there and which aren't.