Footage of chickens living among rotting corpses at a farm ran by Brackley firm Faccenda Foods has led to complaints from an animal welfare charity.
Peta has complained to the Advertising Standards Authority and the RSPCA over Stewkley Poultry Farmin Buckinghamshire which supplies chickens to Faccenda - one of the largest poultry companies in the UK.
The charity believes the video contradicts Faccenda's claim that 'welfare is paramount and that means birds that are healthy and comfortable' and wants the ASA to investigate.
Peta director Elisa Allen said: "Faccenda Foods is trying to hoodwink compassionate consumers with its glib, baseless nods to animal welfare.
"The only truly humane meal is a vegan one, and PETA is calling on authorities to hold this company accountable for duping people into thinking otherwise."
Faccenda is the second-largest chicken-processing company in the UK and sells meat to national firms such as Asda, Lidl, and Nando's.
The company says changes have been made at the farm since the video was taken 12 months ago and all of its farms adhere to EU and UK standards.
A spokesman said: “All of our farms operate to standards above EU and UK legislation.
"They are independently audited and visited on a regular basis by an external vet to monitor bird health and welfare.
"This footage is 12 months old and a number of changes have already taken place on that farm.
"We place high expectations on our people when it comes to looking after the birds in their care.
"If they fail to meet our standards then they will not manage one of our farms.”