My family and I are new to chickens. We started out with two about 2 months ago (one was lost to a predator) and have just gotten a new chick. The first two started out on some sort of feed that was made up of small pieces. We've run out of that and I ended up getting something that looks more like ground corn meal. I assume this is chick starter and will be ok for our newest addition, but can I feed it to a 2 month old? My husband already dumped it into our feed storage so I can't take it back. More generally, what are the different types of feed? When do you switch from one to the other? Thanks for helping out this newbie!