My Golden Sexlink chickens just started laying. I was curious about the different shades of brown. The lighter ones seem to have a thinner shell and some have been cracked on the end. My chickens have oyster shell available, but don't really go for it. I heard that they will eat if their body needs it and won't if they don't...fact or myth? Also, does anyone lay carpet or astroturf in the bottom of nesting boxes to prevent cracking. What is your experience as far as hygiene & less egg cracking? Thanks!