So im hoping for a black and white has anyone else ever bred a bay paing to a black and white and got a black and white?
If both carry only 1 copy of black, you have a 25% chance of a chestnut foal. If your mare carries 2 copies of agouti (restricts black and makes a horse brown or bay), you have 0% chance to get a black pinto. If at least one parent carries 2 black copies and your mare carries only 1 agouti, you have a 50% chance of a black pinto and a 50% chance of a bay pinto ;)
As a side note, recieving a pinto gene (tobiano, frame, splash and/or sabino) does not guarantee that it will be expressed on the body to qualify the foal as a pinto