As I was getting frustrated with a 15mo old hen who brooded for 5 weeks, then "recuperated" for 4 more, the idea of "helping" the egg-laying with pepper does seem very appealing.
I started adding some ground pepper to my chickens' diet three days ago and it may be coincidence, but it worked! Not only I started getting eggs from the lazy hen, but my two pullets, aged 22 weeks, decided to start laying! Their poop is much more watery (from all the water they're taking in), but that's about the only downside.
My two thumbs up for the peppery trick.