There is a good chance that before long Blakemore will hammer some of them. I can't say why I think this, but your right it is not legal to sell pony/horse heads and I think most of them don't realize how much risk they are taking. It uses to be that not many were doing this so it was not worth it for Blakemore to get lawyers and take them to court, but I do believe they realize that the numbers of them being sold have become a large enough number that it's worth taking action, but we will see.

I have Roadrunners that I have the right to tie and sell, but I have permission from Blakemore and I buy my heads from them.