Epinettes for La Bresse kind of go against having them free range, in my opinion. However, La Bresse do need a period of confinement, whether it be a barn, shed or small cage, with a high protein ration to bring them on that bit extra. Say 2-4 weeks but obviously somewhere more humane. If you are doing them for meat, the cockerels need to be separated from the pullets as they will spend too much time fighting, chasing, trying to mate and saving food for pullets to call them over rather than foraging and eating. That is one of the reasons why the French caponise their cockerels.