Nutritive value of distillers dried grains with solubles from barley, corn and wheat for growing rabbits

•Considering their fibrous nature, DDGS inclusion in rabbit diets could have been promoted.•This study characterizes the chemical composition and nutritive value of the barley, corn and wheat DDGS available in the Iberian Peninsula.•DDGS has high content of digestible protein and energy, comparable to other sources of protein frequently used in rabbit nutrition.•The inclusion of corn and wheat DDGS in rabbit diets did not negatively affect the digestibility of the main amino acids.•DDGS’ protein could be considered as relatively poor in the most limiting amino acids for rabbit diets, being required their supplementation.