My baby turned 3 months old and she is on formula feed…my doctor has suggested to feed her in every 2-3 hours about 60-90 ml of milk…but she dosent feels that much hungry…she leaves the milk in the bottle even if i make 60-70 ml…is it ok? Is this normal? Or should i force feed her ? Or should i start any hunger increasing medicine for her ? Specially during night time she likes to sleep and dosent want to drink milk