I breastfed my baby until 2 weeks and then switched to bottles. He drained a 3oz bottle at about 3 weeks old so since then I’ve made 4oz bottles. But he’s never increased on this at all, he's now almost 9 weeks old. If anything, he’s gone backwards and has less than 3oz a lot of the time and wakes every 2-3 hours at night.
A few times he’s been fussy in the evening and has about 6-7oz (sometimes more) over the course of around an hour to an hour and a half. When this happens he sleeps for 6 hours straight through! So what I’m wondering is, how can I get him to increase his feeds regularly rather than just when he’s overtired and fussy?