I have 19 months boy, weighing 12.5 kg. He usually have digestive issues. In for 1 year, we fave him Lactogen 1, 2 and then 3 according to instructions. Since 13th month, we have started Nido 1+. Should i switch to any other milk that can be good for his stomach, digestion? Kindly assist me in this regard... Thank You YYYY@YYYY