For formula fed babies

Has this happened to anyone

My LO has been formula fed since he was a month old we always gave him

GoodStart formula that was the first one we tried and he like it so just stuck with it

But lately it seems likes he doesn’t like it he drinks less the an ounce then starts spitting it out or pushing the bottle out of his mouth ( this is when he’s hungry) so he’s not doing it because he’s not.

Have you had to change formula after a couple of months with your little ones?