9 month old won't take formula anymore 😵

Mr

He was drinking 8oz when he wakes up from sleeping all night and 6oz before naps or bed. Now he won't take any of it! He'll take a sip and push the bottle away. He'll drink water and eat solids but now hates formula... My first did this too! And I started giving her cows milk at 11 months... Is this normal or what the heck?? He's acting so cranky