Dietary organic cranberry pomace influences multiple blood biochemical parameters and cecal microbiota in pasture-raised broiler chickens

•Effects of feeding cranberry pomace (CBP) to pasture-raised broilers were studied.•Analysis of CBP revealed its content of essential amino-/fatty-acids and fiber.•CBP improved blood-serum iron/cholesterol levels and modulated ceca microbiota.•Population of beneficial bacteria increased while undesirable ones decreased in ceca.