My twins are #3 & 4. I have breastfed my first 2 children until 20months old. For the twins I have been giving them formula as well as breastfeeding since they were born while I was waiting for my milk to come in. They are constantly hungry and I’ll nurse them all day and during the night it seems they can’t sleep since they are still hungry. How many of you used both formula and nursing for your multiples? I want them to be full and satisfied. They are 4weeks old and have gained 2lbs each (7&10 lbs) so weight gain isn’t a factor. I usually would feel bad about giving my babies formula since I am able to nurse them, but just gauging if this is normal to use more formula since there are more than 1.