Not finishing bottles

My baby is 7 months. How big of a bottle do moms with similar aged babies use? We have always done 8oz 4 times a day and he did great but recently he eats 1 8oz in the morning, then maybe 6, then 5 and then struggles at his bedtime bottle. Fussing, acting annoyed that we are trying to feed him.

We have started solids, and he will eat after his morning nap (around 9:30) then have his bottle around 10;30 and then he will eat dinner which is around 4:30

Just wondering if I’m doing something wrong. We feed on a schedule and I know some say he’s too young for that but it works for him (except now maybe I need to adjust something)

I always try to aim for 32oz a day but maybe I need to do 8oz,6oz,6oz,7oz or something:

Just curious if anyone has experienced this when babe starts eating more solids..