I know that you start chicks on starter feed and at around 18-20 weeks or so you can move them to layer feed; however, what exactly is the difference in starter and grower feed? I hear a lot of talk about both. My chicks are about 10 weeks old, and I'm about to run out of my bag of Chick Starter, so should I buy more Starter food for them or something different? The only thing I have really found is this DuMOR Poultry Grower/Finisher at Tractor Supply that says it's "designed for growing/finishing poultry from 10 to 18 weeks of age." Aside from that, all I can really find is normal chick starter and layer feed. Any suggestions would be greatly appreciated!