I thought it was color-based and that Pinto draft foals were Vanners and Palomino ones were ACDs, but today I got a palomino Vanner foal.
This is him: http://www.virtualhorseranch.com/viewho ... se=2225191
This is his full sister: http://www.virtualhorseranch.com/viewho ... se=2225185
They have the same build and their height is only about .2 hands apart. Is there something else that determines this or was the colt just a glitch?