Sir Paul McCartney is giving animal activists at People For The Ethical Treatment of Animals a boost on his US tour - by taking on their number one foe in his official tour programme.

McCartney has donated a full-page ad in the programme, blasting fast food chicken chain KFC over its live-scalding of chicks.

McCartney's ad is an open letter to KFC boss DAVID NOVAK, in which he scolds, "If KFC suppliers treated dogs or cats the way they treat chickens, they could be charged with the crime of cruelty to animals."

He continues, "I am a vegetarian because I realise that even little chickens suffer pain and fear, experience a range of feelings and emotions, and are as intelligent as mammals, including dogs, cats, and even some primates."