I mistakenly wrote that it was the Amarillo & Lubbock strains of albino that proved incompatable,although there was or still is an Amarillo albino, it was the Trumbower & Lubbock strains that were said to be incompatable. ( not sure if this means there were three different strains,or if Craig's animals originated from Amarillo.(???) nor am I sure if anyone still works with the less common strain(s).