There is enough genetic material out there now that breeding offspring back to the parent animal for something as common as a pied morph... that you would do best to introduce different blood after that first breeding. That is responsible breeding, and something you should seriously consider if you intend to breed these animals.

Yes, you would get Normals and Pins, Het for Pied. Those that you wanted to hold back, you would breed back to a pied, or het pied.