I'm not sure of their breeding since it was a backyard breeder. But they were sold as lavender ameraucanas. I was suspicious as well when one of the roosters had a straight comb. Their sisters are also laying a more greenish colored egg than bluish, so they are likely not the best quality...
I had two brother roosters, both lavender ameraucanas, about 10 months old. One had a single straight comb and the other a pea/rose comb. The straight comb rooster was aggressive and dominant and he mated successfully with all of my hens. He tried to attack my son a few times so he went in the...