Hi Kara!
So he just went to bed 15mins ago. I was calculating and today was a little better than yesterday, I did not feed him solids at all. He in total had abt 22oz of milk today. But no poop. Waiting for tomorrow to see if he poops. But It took me abt 45-50 mins to feed him around 5-6 oz every time. I made him play in his jumper, lots of rolling around, play yard time, so he burns those calories and makes space for more food for the next feed.
Hoping tomorrow will be better will try to keep feeds for abt 30mins. Fast flow teat was a little messy though as kept a big gulp of milk in his mouth and spit it out many times the entire day, more like he was bored of having milk or tired.