It is absolutely impossible to get a perlino out of two bay horses. You will either get another bay, black or a chestnut/sorrel. The creme gene is never recessive and will ALWAYS show on a coat; unless, it's a smoky black and then the horse will a lot of times, look just like a regular black. But, with two creme genes like the perlino, you have to have both parents with a creme gene to get a chance at a perlino. Hence, the horses would have to be buckskins instead of bays to get the perlino.