Hi, I posted my response on the original thread but am going to add it here, as well.
That article is, in my daintily humble opinion, not useful at all.
According to that article, chickens are pretty useless within two years, and they all start laying at 18 to 20 weeks. That goes against virtually every single thing I have ever read about chickens on here and in books. CERTAIN breeds lay early, most start around 25-26 weeks in reality. I have also read NUMEROUS threads from experienced chickenkeeprs on here that have had their hens laying eggs regularly for years and years, not a lousy 18 months as is stated in the article!
Also according to that article, if that info were accurate, when the days shorten, EVERYBODY'S birds should slow down. Buuuuut they do not. Not everyone's birds slow down or stop.
My chickens have met all the criteria required in the article and still no eggs. I think there is something amiss in Mother Nature because there are SO many chickens that were hatched this spring.... an inordinate number of them... that are not producing eggs here as we near the end of the year! And it's not just my part of the country. All you have to do is read the BYC threads to know that there are lots of us doing all the 'RIGHT' things & still not getting any eggs. It's like there's a worldwide chicken egg-laying strike. LOL.
I think that there may have also been something amiss, maybe, in a hatchery & a buncha barren birds might have been produced? I don't know for sure, just saying that something's gotta be amiss somewhere. I have 8-month-old RIR and BR pullets that don't look or act any closer to laying than they did in July. I was concerned maybe they aren't laying because I switched them to layer food at 20 weeks & maybe they need more protein, so I upped their protein and changed their food to grower/flock finisher with free choice oyster shell. They eat the oyster shell and the food, seem to be really healthy and happy birds... just not gonna lay any eggs is all.