With foals, I do milk pellets until about 3 months, then start adding in a pelleted ration and gradually wean them off the milk pellets by 6 months. Foal ration should be 16% protein, high in fat and made specifically for growing foals/broodmares. I do that for the first year, plus good alfalfa hay. Also, perhaps get him on Grow Foal or a similar foal supplement.
You are going to have a pocket donkey! Congrats again.
You are going to have a pocket donkey! Congrats again.