S.H.
Nurse on-demand, even if every hour.
At the breast.
Your body, should technically, produce milk to mirror what your baby needs.
If you replace nursing with Formula bottles, your body will decrease in milk production. So, if you use Formula, you need to use it AFTER you nurse, as a chaser. Only as a supplement. To your nursing. Not to replace, nursing.
6 months is also a growth-spurt time. So intake and feeding frequency increases. 24/7, day and night.
Always nurse, on-demand. Directly at the breast. 24/7, day and night.
Also keep in mind: for the 1st year of life, breastmilk or Formula is a baby's PRIMARY source of nutrition. NOT solids and NOT other liquids.
Solids for the 1st year, is only an 'introduction' to foods and 'eating.' NOT a baby's main course nor main meals.
At this age, a baby does not have to have solids. Or, if they are, only once a day is enough.
AND breastfeed BEFORE solids. Not after. Otherwise, a baby will be too full to nurse and baby will 'wean' from breast.
Nurse on-demand. Not by a 'schedule.'
ALSO: make sure your baby is latching on to your breasts, properly. IF not, he will NOT be getting enough intake. So see a Lactation Specialist.
Many babies do not latch on properly. They thus do not get adequate intake.