My boy is 1 tomorrow. Since 11 months I started switching from formula to cows milk except one bottle before night. Since Friday whenever he’s had milk (cows or formula) he’s been sick and it’s like cottage cheese. Yesterday he had no milk but food (which included yoghurt) and he was fine, today he had a small amount of weetabix and milk st nursery for breakfast and was sick until he was being fed his lunch. Any ideas 🤔