Youngest GS just hated formula. He would scream, refuse, appear to be in pain, and we worried constantly. Early introduction of baby rice seemed to help quite a lot but he never really took to formula so she was advised to increase solids to maintain weight gain. Once he was old enough for cows' milk it was a different story. My poor DD had a real struggle till then. She blamed herself I think, because the problems only started when she stopped BF at around 6 weeks. GP and HV were very supportive, as was paediatrician. It's a difficult time - I hope things settle down soon Kitty.