Peas and Beans (legumes) are a good way to go for feeding livestock especially if you want growth, they are high in protein around 25% whereas cereal grains tend to be low in that respect around 10/12% which is OK to maintain a fully grown animal but to increase growth at a reasonable rate 16% overall or thereabouts is better for young growing animals, having some experience rearing Goats we grew a plant called Indigo Ferra it is a kind of leafy bush and it was reckoned to have around 25% protein level and it is a member of the legume family, Malunguy is another good feed with high protein content and easy to grow, an addition of chicken layers pellets does most animals no harm.