This is a great article. I'm an old chicken tenderer, and have helped answer questions through the years, but now I'll just share your article when someone asks.
The only thing I personally don't agree with is to just worm my chickens to prevent something they don't have or get. I've never had to worm mine, and if the time comes, I will then.
Very good article.
I only don't agree on deworming every 6 months. Deworming medicines are not harmless and i.m.o. should only be given if there is an infestation.
And I mis info on older hens: older hens take longer breaks in winter. Every year they add a few weeks to their winter break.