Guinea Fowl keets require more protein than chicks... they are Game Birds, and their nutritional requirements are more closer to Turkeys', Pheasants' and other Game Birds'. Turkey, Pheasant or Game Bird Starter Feed around 28% protein, medicated with Amprolium (to help build their immunity to Coccidiosis) until they are at least 6 wks old is what is most recommended for keets. Yah they can survive on chick starter, but it does not contain the level of protein or amino acids that keets need. They will grow slower, feather out slower and you may have feather picking and cannibalism problems from them lacking the protein they need in their diet.