I bought three hens last week, a Bard Rock, a Chochin, and achicken that has a big fluff of a feather afro on her head(not sure what kind she is), Since getting these girls home, not a single one has layed. We were told they were a year old and they were all layers. We feed them layering mash, with the occasional treat like water mellon. They free range during they day and are put in the coop at night. Any help would be appriciated.