Hi My 7 ladies are in a two story condo - the top is their closed in coop - it's two feet off the ground, the bottom level is fenced in and just sitting on the dirt. They free-range around the yard 4 or 5 days out of the week, usually for several hours at a time. They eat Layer Crumbles, and table scraps of all kinds (except chicken - sorry, personal preference) fruits, veggies, pasta, etc. I also have Scratch, but have not given lately because it was too hot out! The three that are laying, the eggs have nice hard shells. The other four should start laying sometime in December. So far, I have not given them GRIT and I have not given them any CALCIUM supplementation (other than yogurt, occasionally). Should I be giving (supplementing) them grit and/or calcium?? I want to keep them healthy and happy (and makin' eggs!!!) Thanks!!!