Yes, this is a defect. It means that both of her parents must not be homozygous for blue eggs, as the gene is dominant. If she hatched from a blue egg, then her mother had only 1 copy of the blue egg gene. Her father (having never laid an egg to inspect) had either 0 or 1 copy of the blue egg gene. I would not breed from her or either of her parents, and if she was from someone else, please inform them that their chicks are not breeding true for blue eggs.My cream leg bar is laying lite pinkish brown eggs and I know she is a leg bar! Is this a defect?
I know a lot about this because I have the same issue with my Isabel Legbars (aka "Opals"). I sold a *lot* of chicks last spring, all hatched from blue eggs, and was careful to tell every buyer that their was a chance (50% or less) that the chick would lay a light brown egg. Still, to get such beautiful and productive hens, it was worth the risk for many people. The light brown or pink eggs are still wonderful, and those isabel pullets are great layers. Most customers bought a few Opals, plus a few regular cream legbars (that I am sure will lay blue eggs) so their basket is assured to be colorful. So far, no one has complained about getting too many non-blue eggs, and the sexing has been 100% accurate, which is stunning, given that they have the lavender gene that mutes the down colors so much.
She is a definite keeper for laying eggs, though.