It is going to be close to 80 degrees here today (woo-hoo!) and I thought it would be a perfect day for my chicks first outing. If they go outside, do they need grit? I don't have any on hand, as they have only been eating the starter feed/chick crumbles. So, what I am asking is, should I wait to take them outside until I have grit on hand to feed them?!?! Thanks!