They are led by Mackenzie Crook as Rooster's closest friend Ginger, a gauntly timid creature who treats the outcast with equal affection and scathing scepticism.
The strong supporting cast feel similarly, vividly alive. Chickens peck in metal cages and a goldfish swims in a polythene bag. Full-size real trees, bushes and grass wrap around Rooster's little world, extending into the wings and up into the rafters.
The stage design by the man known only as ULTZ is equally magnificent.
