Hello, So basically you are feeding baby powdered whole milk product as before he received a mixture of low fat milk, whey protein, vegetable oils and vitamins and nutrients appropriate for infants up to 6 months. Since Nido is whole milk, baby may be lactose intolerant and unable to consume that much milk. If you are using a community program, perhaps you should see if there is another product baby can try that is not so high in milk, perhaps soy? Do you have a pediatric dietitian available to you? I am looking at Lactogen3, a low lactose formula for infants over 6 months; if that doesn t work look for a soy based formula or ask your pediatrician. Thank you.