Had a relative experience, but I tried a trick to make the hens believe I was Papa! It worked....funny to say.
First off...12-14 hours of light is necessary, better a Red or other color bulb works best when it is dark out and they go to roost. Now what I did in the morning when I greeted my Gals, was to hover over one at a time and they squatted down as if readying for a Roo to jump on. As the squatted, and put their hind end up, I squeezed gently on both sides of the butt in a massaging motion for approximately 30 seconds. It seemed to energize them and they became laying machines thereafter.
Note: The only problem I had, was everywhere I walk, my free range hens follow me and want their daily massage. Too funny!