I am currently in the process of having a selection of miniature horses sculpted by a sculptor who is new to doing horses. In total I have commissioned 5 different horses in interchangable multi-part form. The sculpts stand around 27mm to the withers, and will be cast in metal once complete.
I've been getting opinions throughout the commission from a friend whos a vet and another friend who studied horse anatomy, but thought it was time to get a few more opinions. This place seemed ideal.