hi i have 39 days old baby, I want to feed him fomula milk, which would be the best to use

A. hi dear Feeding Your 1-Month-Old Baby Continue to feed your baby whenever she seems hungry. At this age, that's probably about eight times in a 24-hour period for breastfed babies or about every three to four hours for bottle-fed babies. If your baby is mid-growth spurt she may want to eat a little more often.