The real cost of the chicken in your supermarket trolley

Chicken has become such a staple of the British diet that shoppers have grown used to paying less than a pint of beer for a whole bird in a supermarket. But the supply chain that leads to the shelves is mired in ethical and environmental dilemmas, finds Simon Usborne. Help support our independent journalism at <a href="https://www.theguardian.com/infocus">theguardian.com/infocus</a>