The lupin (L. angustifolius) used in the present broiler study was the cultivar Emir, which was grown in Poland in year 1996 and considered to be a low-alkaloid variety (Alloui et al., 1994). The composition of the two basal diets is shown in Table 1. The non-lupin diet(dietA)consisted of maize and soyabean meal as the main ingredients, while in the lupin diet (diet B), parts of maize and soya bean meal were replaced by 200g blue lupin/kg. The two diets were supplemented with essential amino acids to meet the requirements recommended (NRC, 1994) for broiler chickens. The two basal diets were either fed alone or, for the lupin diet B, in combination with different enzyme preparations