Hi, i have three hens in an urban setting (housing estate). All in and around the same age and two are laying but one seems to be a bit detached from the other two in the run. My problem is she will not talk and when i think back she have never spoke,she does open her mouth from time to time but nothing.Would appreciate and input please. They are approxaimatety six to eight months old and i am new to keeping hens. i do enjoy it. Thanks in advance.