I'm trying to bump up the calorie value of the Trikester's diet, and was hoping to introduce some grains. He eats chunkier mashes like avocados and finger food like puffs and cut up melon without problems. I've tried both barley and quinoa - they make him gag to the point of vomiting. I thought it was the texture or flavor so I puréed each with pears and apple juice but same effect (along with an allergic reaction to the cinnamon I threw in).

What grains would you try next? Other nutrient dense foods I should try? He's just hit the 9 month mark.