No problem! I love the breeds you have! They're some of my favorites! I have about 35 chickens. They are a mix of Barred Rocks, Americaunas, Buff Orphingtons, White Legerns, Rhode Island Reds, OId English Bantams, Cuckoo Marans, Cochins. Welsummers, Blue Laced Wyandotte, and a few others! I also...
Giving chicks grit is a personal preference. I would at least wait until they are a week old to give them grit, so that they can get used to their regular food. It won't hurt. Every thing your doing is great too! Keep it up!