Help..... I have two chickens, a white leghorn and RIR. The leghorn has always laid eggs with a decent hardness of shell. However, the RIR has alwayslaid eggs that had a really thin egg shell and cracked very easily. Well the last two days when we simply went to grab them they literally broke in our hand from that minor pressure of picking them up. Also today the shell, which normally is brown, looked like the hen ran out of brown paint at the end and looked speckled and lighter than normal. Is she OK? What do I need to do to increase her egg shell strength?