I would assume yes, since breeders cull against it... but my rooster was born out of two solid black araucanas who showed no leakage. One of his brothers was coal black and perfect, but my roo and two other brothers had various amounts of leakage. Does he still have the genetics to throw solid black, or since he has so much leakage will his offspring definitely show leakage? Here is my Cholo helping me clean up the garden yesterday. I wish it would have been sunny so you could see he also has reddish brown, blue and purple in with all that straw color. He's quite the rainbow for a "black" araucana!