Gonzo,
Probably the reason that you have heard multiple instructions is because of confusion as to what starter and grower feeds are. Depending on where you live and the feed available there, both sets of instructions are right.
Starter and grower feeds are different feeds in some places. Where you can purchase them separately, then start them on the starter and then switch to the grower like the previous poster suggested. However, in some places (like where I live in NW Florida), the feeds are not available separately (at least locally). All of the starter feeds are labeled as Starter / Grower, and the feed stores view these two as one and the same feed. In that situation, just use this feed from day one to the time they start laying eggs, at which time you will need to switch to laying crumbles or pellets.