feed on demand n every 2hrs is good. babies know there tummy requirement n fullfill accordingly. fore milk then ends with hind milk

Foremilk is generally in the first few minutes. If baby is suckling for fifteen minutes then she is most likely getting foremilk and hind milk. Baby should be comfortable sleep well urinate about seven times a day and over all gain weight. These are indicative that she is getting enough. A four month old is generally efficient and strong with her suckle and will be able to get the desired quantity rapidly.

feed on demand. don't worry. don't do force feed. if you feel that your baby didn't drink sufficient milk, then express and give it in spoon paalada. try maximum to avoid bottle as it may lead to nipple confusion. if your baby is hungry, obviously she'll cry. so feed on demand