Chickens? What chickens? Chicken is already plural!
Shame on BBC.
I was one of them who would always swear by BBC, as one of the best news agencies in the world. I have been noticing similar errors in the past couple of years. I believe ARRSE is the right place to highlight this slide in standards. If anyone has connections in BBC, please remind them, that if not anyone else, BBC must uphold the English language.