Why did he have to do Amy first?

I was disappointed that the doctor vivisected Amy first. You'd think he'd save the best ones for last, and want to savor the females most of all. Instead, Beau Garret's natural beauty is ruined for the audience when we see her ideal curves being cut up. That one scene was especially chilling, which is good for overall horror, but a waste of such an attractive female cast. Seeing Amy bound, gagged and awaiting such a fate in the cages or on the other table would have been a better way for the director to go.