Feeding broiler chickens with practical diets containing lupin seeds (L. angustifolius or L. luteus): effects of incorporation level and mannanase supplementation on growth performance, digesta viscosity, microbial fermentation and gut morphology Journal title: Journal of Animal and Feed Sciences Authors: S. Smulikowska, P. Konieczka, J. J. Czerwinski, A. Mieczkowska Subject(s):