Are they pumped up?

The answer is simple: no! Modern’ chickens are bigger than they used to be because over the years, breeds have been selected that are characterised by a natural and spontaneous growth towards the size most appropriate to mankind’s dietary needs and certainly also to commercial needs.
These breeds, bred in climate-controlled and bio-secure premises, together with the constant exchange of information between breeders and veterinarians, grow more naturally and also consume less water and food than their ancestors. This is thanks to research and advances in food science that are committed to ensuring that the world’s population set to double (projected to double in 2050) will have enough food for everyone, bearing in mind that such practices also help keep food affordable.