My baby girl is 2 year 8 months old. She is having constipation issue since she started formula milk. Do I didn’t gave her any milk but gave her curd. Sometimes her constipation was fine and sometimes again very much constipated. Constipation occurs but stool isn’t hard. Checked thyroid, wheat allergy, even milk allergy, all is fine but still constipation is there. Plz suggest something