The RSPCA has released a brochure that tells shoppers where they can buy food that doesn't contain battery eggs. The guide, called Eggs in Food Products, was handed out at the Ben & Jerry's Sundae on the Common music festival in London last weekend and is available online at It claims only 15% of eggs used in foods are free-range or barn, compared with 37% of eggs laid in the UK. "If people that insist on higher welfare eggs also insist the ready-made food they buy only contains higher-welfare eggs, we could free millions more hens from battery cages," said RSPCA campaigner Chloe Alexander.