Intensively reared supermarket poultry is hardly a standard. Not in the UK anyway. Various respected media outlets have done undercover investigations in to the poultry supply chain. High-profile chefs have done campaigns to increase welfare and change buying habits. The RSPCA have serious concerns about intensively reared birds.

https://www.rspca.org.uk/whatwedo/latest/details/-/articleNa...

https://www.independent.co.uk/news/uk/home-news/chicken-supe...

https://www.theguardian.com/world/2014/jul/23/-sp-revealed-d...

https://www.theguardian.com/business/2017/sep/28/uks-top-sup...

https://www.theguardian.com/business/2017/sep/28/uks-top-sup...