Udomowieni przedstawiciele Gallus gallus dostarczają ludziom ogromnej mięsa oraz jaj. W samej Polsce liczbę niosek szacuje się na 48,4 mln (stan na rok 2016, według Krajowej Rady Drobiarskiej), zaś w Unii Europejskiej 382,8 mln (stan na rok 2015, według zootecnicainternational.com). Większość ptaków utrzymywana jest w produkcji wielkotowarowej, ale konsumenci coraz chętniej poszukują produktów pochodzących z alternatywnych źródeł.

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15. http://www.featherwel.org

16. (https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/69374/pb10596-feather-pecking-050309.pdf) - Defra (2005) Department for Environment, Food and Rural Affairs - A guide to the practical management of feather pecking & cannibalism in free range laying hens. 

17. (http://www.featherwel.org/Portals/3/Documents/Advice_guide_%20V1.2%20%20May%202013.pdf) - Improving Feather Cover - A guide to reducing the risk of injurious pecking occurring in non - cage laying hens, Version 1.2, May 2013 © University of Bristol