Chickens are so-called omnivorous animals, which require a thoughtful and balanced diet to ensure a good yield. Protein intake is also very important for their muscles and their good egg laying. In order to produce quality chicken, we are interested in defining the optimal combinations of food sources of protein (legumes and cereals). It has been shown that the combination (Phaseolus vulgaris, Triticum turgidum) gave a 7.14% greater weight increase than the weight increase provided by the combination (Pisum sativum, Triticum turgidum). It has been shown that the combination (Phaseolus vulgaris, Triticum turgidum) gave a 7.14% greater weight increase than the weight increase provided by the combination (Pisum sativum, Triticum turgidum). The costs of food sources in the first and second combinations are on average higher than the costs of the control diet, by 35% and 32%, respectively. The costs of food sources in the first and second combinations are on average higher than the costs of the control diet, by 35% and 32%, respectively. Such an increase in the feed costs ingested by the hens was offset by an increase in weight.