I have a small backyard flock, 2 barred rocks and 4 black australorps. We got them as chicks kind of late, June 27th to be exact. I figured that would put them into laying mode around the end of November. Well, the lead hen, Braveheart, started right on schedule. But she's the only one that lays anything. When she started, I switched the whole flock from pullet grower feed to layer mash. Could this be a protein content issue? Also thinking it may be a lighting issue....maybe some supplemental lighting would help since we are coming up on the shortest day of the year. Any help would be appreciated. Thanks!