My dad and I are probably going to get some chickens for egg laying. The choices of chickens are, RIR, Cornish rock, assorted bantams, Srtaight run chicks, and assorted pullets. we don't know wether to get chicks or pullwts. anyway out of those choices what would be the best egg layers? I am guessing RIR. and second we dont want our yard looking like a zoo with too many animals. so how big would our coop have to be for just 4-5 hens?