Just bought 6 bantam chicks from feed supply store. They had arrived at the store only an hour before I bought them, so they must be just a few days old. We intend to buy 6-8 more standard sized hens and raise them to live together. How soon would you buy the bigger hens? Should I wait a week or two to give the banties some growth and a little head start? The birds from the other store could possibly be a week or so older than our bantams. Advice and anecdotes appreciated!