Cows milk protein allergy (CMPA) & lactose intolerance in breastfed babies Read this page in Welsh (Cymraeg) 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 Reflux and your baby Cows milk protein allergy (CMPA) & lactose intolerance in breastfed babies Tongue tie