I aM going to start a flock of laying hens. I'm going to get about 15 or so. I'm wondering if i should get all the same kind or mix them up a bit. I think if I get all onE kind it will be Barred Rocks. And if I mix them up it will be a mix between barred rock buff Orpington Rhode island red black sex link and silver lace Wyandotte. Please help of you have any advice. Thanks!