So, I understand it can be a good idea to offer small grit to chicks around 2-3 weeks old (mine are 2.5 weeks old), so I got some "All Pet Bird Grit & Gravel" and put some out in a freestanding dish. They are supposed to only take it if they need it, right? Well, my chickies ate it all up like candy. Are they in THAT dire need for the grit? They are on chick feed and get soft treats (watermelon, cooked green beans, chopped alfalfa) and have been outside a few times to eat bugs. New England soil is pretty sandy, too, so I figured they would get some grit just from being outside. Should I put out less to keep them from eating it all up? Or put out more because they must need it since they are taking it?