▁area ▁is ▁roughly ▁rect angular , ▁approximately ▁ ▁by ▁, ▁and ▁includes ▁parts ▁of ▁the ▁départ ements ▁of ▁Ain , ▁J ura ▁and ▁Sa ône - et - Lo ire , ▁in ▁the ▁regions ▁of ▁Rh ône - Al pes , ▁Fran che - Com té ▁and ▁Bour g ogne ▁respectively . ▁It ▁lies ▁mainly ▁between ▁the ▁towns ▁of ▁M â con , ▁Chal on - sur - Sa ône , ▁D ole ▁and ▁L ons - le - Sa un ier ; ▁Bour g - en - B resse ▁is ▁within ▁the ▁area . ▁Lyon ▁is ▁not ▁far ▁to ▁the ▁south , ▁and ▁D ij on ▁not ▁far ▁to ▁the ▁north . ▁ ▁Appro xim ately ▁ 1 . 2 ▁million ▁pou let ▁de ▁B resse ▁birds ▁are ▁produced ▁each ▁year , ▁about ▁ 0 . 1 % ▁of ▁the ▁total ▁annual ▁production ▁of ▁ch ick ens ▁in ▁France ; ▁about ▁ 1 0 % ▁are ▁export ed . ▁The ▁ch ick ens ▁are ▁raised ▁under ▁strict ▁controls . ▁There ▁are ▁about ▁ 2 0 0 ▁bre ed ers ; ▁each ▁must ▁have ▁a ▁minimum ▁of ▁ 0 . 5 ▁ha ▁of ▁past ure ▁in ▁the ▁area ▁of ▁production , ▁and ▁allow ▁a ▁minimum ▁of ▁ 1 0 ▁m 2 ▁per ▁bird . ▁Each ▁bird ▁must ▁pass ▁ins pection ▁by ▁the ▁Centre ▁de ▁Sé lection ▁de ▁la ▁Vol aille ▁de ▁B resse , ▁the ▁only ▁bre eding ▁centre ▁for ▁the ▁B resse ▁ch icken . ▁▁ ▁The ▁birds ▁are ▁kept ▁free ▁range