So lately when I feed my son his oatmeal cereal in the morning, he starts being fussy

Tamara • Mommy to my 2 beautiful baby boys, Nathan Louis💙 born August 12, 2017 and Parker Joseph May 6, 2019❤️ My whole world😍

He starts crying and rubbing his eyes, I don’t know if he’s just tired or doesn’t like the cereal ? He still will eat the cereal, doesn’t push away or anything..but is super fussy. But if I put a puff on his highchair he’ll eat it and be happy. Opinions???