I'm getting 2 buff pullets, 1 barred rock pullet, 1 white leghorn pullet, im wanting to free range them without a rooster I do have a fence around the coop they can free range in, will they be ok without a rooster or do I need to get one? We do have Hawks in the area sometimes not often they come & go, i have almost 7 acres of land most of it is woods. Thank you!