Just like law"Normal until proven genetic"! She is getting bred with maybe an albino this year, so that if she is a Co-dom/Dom the babies should be distinct and if not when bred together we will see if she is recessive and possibly make snows since I think she is sometype of axanthic.
Put her back to a son next season and try to prove her out worst case is you make possible het Albino
But at least you would know
Laziness is nothing more than the habit of resting before you get tired.