Today is the day we move the chicks outside to their coop. They're about 5-8 weeks old now. Some were older than others when we bought them. My question, though, deals with grit and their chick feed. Do I mix the grit in with the food and if so, what's a good ratio? Is it better to just have grit in a separate dish and available to the chicks? In the brooder in the basement, we've been adding grit to the food, but i'm not sure how much is too much or too little.