My chicks do very well on Purina Flock Raiser crumbles (20% protein). Periodically, I give them apple cider vinegar in their water at the rate of 1 tablespoon per gallon (but don't do this in a metal waterer). I think it's very helpful for them to have access to pasture or untreated lawn for...
To substantially reduce the risk of disease, be sure you're buying chicks from a farm or breeder that is NPIP certified.
Rooster are SUCH a pain to deal with that I'd highly recommend purchasing these breeds from a hatchery that will sex them for you. You won't be able to sex any of the...