Is my steer stubborn or am I overreacting?

I’ve got a 4H steer I’ve been getting ready for fair. Finally got him used to people, now he’s walking better with a halter and getting desensitized to loud things. But sometimes when I lead him to water, he don’t drink. And when he’s tied up afterwards he gets a little heavier breathing and licks his nostrils a bunch. Is this regular behavior or is he dehydrated and not drinking? Any help is good, thank you