Ok, theoretically...
Let's say you had a group of Het Albino 50% Het Piebald females, and you had a male DH Albino Piebald and a male Piebald, all ready to breed for the first time. Would you breed the Piebald male to the females to prove which ones were true DHs and wait until the next year to breed the DH male to them, or would you take the chance and breed the DH male to the females first?