Dd1 was 6 weeks early and struggled with her weight, even at 3.5 she is apparently underweight. She started on solids very early, at 4 months or 3.5 corrected there abouts. It helped with her weight gains and she was much more settled. We did this on the advice of our pead.

Dd2 was a late starter at almost 9 months and Ds was 5 months.