I think I might skip the discount on a single print in favor of a discount on a package. Kind of a "reward" for a bigger purchase but I may be the wrong person to ask since I only do in-person sales and don't shoot at dog shows. The market is certainly different!
This is probably a topic for a separate thread but whenever I photograph dogs for a Breeder my sales are much smaller than when it's a family coming in for a dog portrait. It seems odd to me -- since some of the breeders spend THOUSANDS of dollars on their show dogs -- yet they seem to balk at spending money on portraits of them.