Ah, so you got them from someone that had some of Kat's line. So, that person's breeding is what caused the light eggs, not Kat.
The birds I have now, are directly from Kat's hatching eggs. Once I start breeding and raising them, they will be my line, as I make the choices on who to breed to whom.
Would be like blaming Paul or John, for poor Quality birds.... even though the original person that bought their stock, had been raising them for awhile and made bad choices. So everyone would think, the poor egg color or what ever, is directly from Paul or John's stock, when it wasn't the case at all.
Is my take on it.