April baby eating habits...

Nichola
Hi mums!
So when my son was born he was a very hungry baby. Now as he reaches 4 months his eating habits are becoming a source of anxiety for me.
To set the scene, he goes to bed at 7pm and sleeps until 5.30am then he has feed 1 (6oz) and back to sleep until 7.30am. Then he will feed every 4 hours at 9.30am, 1.30pm, 5.30pm then top up feed at 7pm.
He has about 6oz a time maximum but more often that not he won't finish a bottle. He has no issues with wind or reflux or colic, he poops regularly. He has dropped down a percentile for weight but the HV isn't concerned.
Is he just a fussier baby than others?