Allowing does not means that's doable: chickens need to eat, as any living being, if you can spare a bit of precious (in such dense areas) space to rise enough

Allowing does not means that's doable: chickens need to eat, as any living being, if you can spare a bit of precious (in such dense areas) space to rise enough some chickens but you can't nourish them except buying foods from local grocery store... You can just keep them, perhaps buying some crappy food from them at the same price of eggs and already butchered meat... Here (France) I've already seen small 5kg sac of cereals "for poultry" at 5 EUR, while a cooked, ready to eat, chicken is about 4 EUG/kg and eggs can be found around 10 cent per egg... For pig is even worse: I can found pig meat ready to make sausages at home (just grinding, adding salt around 15g per kg of meat, a bit of pepper, anything else you like) less than 2€/kg...