Cows milk protein allergy (CMPA) & lactose intolerance in breastfed babies You can read our factsheets about the symptoms and managment of cows milk protein allergy and lactose intolerance in breastfed babies. Breastfeeding Challenges – read more Pain: if breastfeeding hurts Low milk supply and helping your baby gain weight Baby won’t latch Baby breastfeeds all the time Reflux and your baby Cows milk protein allergy (CMPA) & lactose intolerance in breastfed babies Tongue tie