The sport of competitive pigeon flying (or ‘doo fleein’, in the parlance of its practitioners) is a centuries-old Scottish tradition, and the pursuit of no more than about 1,000 Scots. It requires an expertise in all things pigeon, but essentially boils down to luring an opponent’s birds into a sexual rendezvous with your own pigeons. Pouters follows two longtime rivals, Rab and Danny, as they compete for doo fleein’ supremacy among bleak Glasgow apartment tower blocks.