Digestibility and energy value of pea (Pisum sativum L.), faba bean (Vicia faba L.) and blue lupin (narrow-leaf) (Lupinus angustifolius) seeds in broilers

•Peas were found to be high in amino acid and AME content and amino acid digestibility.•The digestibility of the most amino acids, especially cystine can be considered to be low in faba beans.•Most amino acids, especially lysine, were well digested in blue lupin, but it was a poor source of AME.