The productive parameters of parent flocks of guinea fowls kept during the reproduction period in open-air aviaries were compared. The birds were divided randomly into three groups, each comprising seven replicates, twelve birds per replicate. The first group was fed a complete diet, while the birds in the second group were given, in separate feeders, maize grain and high protein and mineral-vitamin components. In the third group, maize was substituted by wheat grain. All feeds throughout the experiment were fed ad libitum. Daily intake of metabolizable energy was very uniform in all groups in which the basic source of energy was maize, irrespective of the way it was fed. Daily protein intake was similar in all groups. Guinea fowls fed complete diets had higher laying rates, utilized feed better for egg production and laid eggs of higher weight. The results indicate that the applied feeding system had an influence on production parameters during the reproduction period of guinea fowls.