I hope people add scientific studies, good free manuals on poultry care, management, feed, genetics, breeding, behavior and so on for all types of chickens... kid friendly and adult in-depth. I can not guarantee how long links will be good but at least the opportunity to read a free well put...
Assessment of Chicken Feed, Feeding Management and Chicken Productivity in Intensive Poultry Farms at Selected Farms of Three Zones in Tigray Region...
Review on the effect of feed and feeding on chicken performance
https://www.oatext.com/review-on-the-effect-of-feed-and-feeding-on-chicken-performance.php
Arsenic in chicken feed may pose health risks to humans, C&EN reports
https://www.acs.org/content/acs/en/pressroom/newsreleases/2007/april/news-release-arsenic-in-chicken-feed-may-pose-health-risks-to-humans-cen-reports.html
Egg Size and Your Small Flock of Laying Hens
https://www.gov.mb.ca/agriculture/livestock/production/poultry/egg-size-and-your-small-flock-of-laying-hens.html
An HSUS Report: Welfare Issues with Selective Breeding of Egg-Laying Hens for Productivity
https://www.humanesociety.org/sites/default/files/docs/hsus-report-breeding-egg-welfiss.pdf
Effects of egg size (weight) and age on hatching performance and chick quality of broiler breeder: Journal of Applied Animal Research
https://www.tandfonline.com/doi/full/10.1080/09712119.2014.987294
Mississippi State Link Page... for some reason Unit 1 does not work but the others do.
https://extension.msstate.edu/content/4-h-poultry-other-publications
Poultry Training Manual Clemson Cooperative Extension College of Agriculture, Forestry and Life Science.
https://www.clemson.edu/extension/camm/manuals/poultry_toc.html
Okay I decided to start a thread where I can park useful links to free resources for poultry keeping and showing. Hopefully this will prove useful to everyone.