OK, quick backstory... got my first 4 hens( 2 -ee, 2-rsl) end of April, they were approx. 3 months old, and they all started laying at about 5 1/2 month. All seems normal with them. End of May I got 2 more hens, barred rocks, approx. 2 1/2 months old. At about 5 1/2 or 6 months old, one started laying for a month, then stopped. I assume only one was laying because I never got 2 barred rock eggs the same day. After the one month of laying no more eggs from the barred rocks. Been probably 2+ month with no barred rock eggs. They do free range most evenings and weekends, but I've looked good, and don't find eggs laid elsewhere. Also, I've left them in their coop and run a few days in a row to be sure. No eggs. The 2 barred rocks are at the bottom of the pecking order, but they are not badly harassed, just a peck from the rsl's now and then at treat time. Any thoughts on why no eggs, and will they ever lay again? Any help would be appreciated. Thanks.