Pediatrics My 7.5 month old daughter tries to sit independently, crawls and tries to pull herself up to stand. she makes eye contact, laughs and plays and makes sounds aa, oo. She is on d3 and iron supplement. She sometimes shivers head while feeding to sleep. She is not disturbed by movements and continues feeding and sleeping. we showed it to pediatric who said this is normal. Last two times she shivered entire body. we held her hand and hand stopped moving but head continued shaking for 1-2 secs. Worried is this something of a concern.