I thought I had read a while back that someone said you could crush egg shells and feed to your chickens for extra calcium. I have recently had someone tell me that they can smell and taste the eggshell and will start eating their own eggs. What is your opinion? Also, my mother said "in the old days" they would allow old milk to clabber (spelling?) and feed it to the chickens. Has anyone tried this? In all honesty, I did it yesterday and they loved it! But didn't know what other chicken lovers have done.