I've got 3 hens & 1 rooster. They're about 4 months old now. They love their little coop that's about 10x10 with a dirt & wheat straw bottom. I feed them regular chicken feed with a high protein content and also give them veggies and fruits on a daily basis (zucchini, tomatoes, oranges, bananas, watermelon, love it all!) and I have started feeding crushed egg shells. I've been looking at posts saying "Do give oyster shells", "don't give oyster shells", "give grit", "don't give grit"...... Do my chicks need to have grit supplemented in their diet?? And, do they need oyster shells?