Sclerocarya birrea caffra nut meal as a substitute to soyabean meal: Effects on growth performance, feed intake and utilisation and viscera macromorphometry of blue-helmeted guinea fowl

•Marula nut meal can be used as a replacer of soyabean meal in guinea fowl feeds.•Use of other tree seeds as dietary protein sources in poultry feeds needs further exploitation.•Marula nut meal does not affect the viscera macromorphometry and feed utilisation in guinea fowl.