I agree with Lurchergrrl, the cruelty is not neccessary.
The fact that it is dogs, horses or whatever makes no difference but there should be some standards. However, there aren't and even when there are they are not always adhered to.
Did anyone see the documentary about slaughter houses a couple of years ago? This was a slaughter house in England, I forget where but some of the employees did the meat trade no favours what so ever, they played games with pigs and stunners and laughed about it, I can only hope that they lost thier jobs as a result.