No I am not familiar with that one.There is also comments about high levels of carotenoids in eggs if that makes sense to you . My girl messed about from the beginning but her first 2 lays she dropped eggs then dug and laid. I started arcadia supplements in oct . And this time she is not digging or laying i dont know if the supplements have any bearing on this but will b changing . Iused pro rep calcium b4 are you familiar with it