Trying to enter a grade pony into "Other Pony Cross/Mix"

When I try to enter my grade pony (Pinball Wizard) into "Other Pony Cross/Mix" for the Kangaroos and Kiwis show, I'm told he's not eligible because he's a purebred. His breed is selected as "Grade Pony." He is shown as a true grade sport type pony, of completely unknown breeding (as is common for sport ponies in California). How can I fix this?

Hi there, this is because the cross/mix class is set for crossbred horses only (so any horses that have at least two breeds selected). For that particular show, it looks like Grade Pony just goes under "Other Pony," not "Other Pony Cross/Mix" :)