I love my chicks, everyone is doing well. I think I have one roo, but we'll see. Other than that, everyone is feathering out and all have that wonderful tufty-feather rock star look. I have some rose comb brown leghorns, some dominiques, and some partridge rocks. When it gets close to the earliest breed's point of lay (about 18 weeks for the leghorns- someone please verify?!) I was thinking of switching to flock raiser and have some oyster shell on the side for them- but all the hens would have access. Does it really matter if I switch everyone to the layer pellets at 17 weeks? I don't know the points of lay for the other breeds but I'm sure it'll be easy to look up. I guess my question is... will the other breeds eat the oyster shell and have it cause problems, or what? I also have hard well water with calcium in it. If they get enough in the water will they just supplement with the oyster shell or will they overdo it? Thanks!