'The best example of what living constantly with humans leads to'

I see that the supermarket chain Sainsbury's is doing its bit to cut 'emissions' by removing brown eggs from its shelves in favour of white ones, which, according to its research, have a 12.7 percent lower 'carbon footprint' than their brown cousins. This major contribution to achieving 'net zero' has, of course, nothing to do with the fact that white eggs are cheaper and easier to produce... Anyway, this got me thinking about chickens. The domestic fowl (Gallus gallus domesticus) is the most numerous bird, and the most numerous domestic animal, on the planet, with a population estimated at upward of 26.5 billion (four chickens for every human?). Our debt to them, as producers both of meat and of those natural wonders, eggs, is immense – but are we grateful to them, do we appreciate them? Of course not. Here is the great Polish poet Zbigniew Herbert's tribute to the doughty fowl –HenThe hen is the best example of what living constantly with humans leads to. She has completely lost the…