The breeding of Bresse poultry is carried out within a defined area: a vast sedimentary plain rich in silica and clay. The soil, covered by an impermeable layer, is moist and abundant in grasses, worms, and insects that constitute a third of the poultry’s diet. These birds come exclusively from the Gauloise or Bresse breeds, which are white varieties. They are raised free-range, with access to grassy areas, and undergo a finishing period in an épinette for 252 days. Each poultry has at least 10 square meters of space in their range, with breeding, hatching, and slaughtering taking place exclusively in Bresse.