This is funny because I was just in the feed shop getting a few things for when I pick up my girls on wednesday, and I mentioned feeding shells. The woman looked at me like I had suggested cannibalism and insisted that my chickens would turn on thier eggs and I would wake up one morning to a masacre. I was buying oyster shells, and plan on offering both. Has anyone had a problem with feeding shells? As a newbie- I can take all the advise I can get!