I have 6, 9 wk old chicks my granddaughter 's class hatched. I think at least 4 are roos and we can't keep them in the city. I would like to find 3 or 4 pullets about the same age to replace the roos as they "leave for the farm". I live in WI near the MN boarder and close to the Twin Cities. Is it possible to find these or do I have to start with chicks?