Okay, so I have a few questions about my new chicks and their feed. First of all, I've read that you should start feeding your chicks grit when they are a few days old. Is this necessary, and when should they be started on it? Secondly, my chicks are only a few days old, but I am curious as to when to start them on developer feed. I read in a book that you should give it to them at about 5-6 wks. of age. But, at the feed store I bought them from, they told me fed starter until they're 18 wks. and then switch to layer ration. That didn't sound right to me, but I would be interested in hearing what other people have to say about this. Advice is greatly appreciated! Thank you!