Here is a copy of my e-mail to them:
Dear Shipshewana Auction,
I'm writing to tell you of my utter disgust with the way you facilitate horse slaughter. These animals are innocent and trusting, and if that does not phase you perhaps the idea that they are the reason horsepeople win awards and money will. I know that you will not take into consideration the horrible crimes being perpetrated against these animals, but rest assured that you in no way will recieve the support of me, my family, my colleagues, aquaintances, friends, and enemies. Your auction may be "world famous", but it is for all of the wrong reasons. Furthermore you could argue that the meat will be going to feed people around the world but lets look at this realistically: horse meat is considered a delicacy in many of the countries that it is shipped to, and therefore will not be going to say, starving children in Darfur. Your greed drives American capitalism and gives Americans a bad name to the rest of the world.
I kept it short because the comment box is fairly small. Go get em' guys!