My 5/6 week old chicks have been outside for about 8 hours a day for the past four or five days and they totally love it. They have been eating plenty of grass and bugs. However I've noticed they haven't touched their grit. I've made it available to them all the time, even when I bring them inside for the night, but they have yet to touch it. I was thinking they would've eaten some of it by now considering all the things they've been eating. Is this normal? Should I trust them to know when they need it? Anything I should do to make sure they are getting enough grit?