That is why shopping around is so important. Chick starter/grower or just chick starter depends on brand should be 20% protien not above 24%. This is where it will get confussing there is another chick starter/grower that is made for older chicks. It can be sold as crumbles or not and is ment for chicks after 6 weeks of age. It is usually lower protien but sometimes not. If you have heavy breeds like over 7lbs for a rooster or hen then keeping feed at 20% protien thru out there life is a good idea. If you have the lighter breeds then you can drop it down below that when they are laying.
Check your phone books Yellow pages look under feed store or feed mill or feed grinding. Also go to company feed web sites and do a dealer search to find your closest dealer. Some to look uo are Blue Seal, Purina Mills, Kent, AMC, Southern States and there are more just read thread here for more names.