Check him for several mornings to see if it's emptying.
If you are feeling of his crop during the day when he's been eating/drinking then you will feel (food/water) in the crop which can sometimes feel squishy/soft or firm depending on how much he's filled up.
It's always good to be aware...
If his crop is still full in the mornings before he's had anything to eat/drink, then access the crop and determine which treatment you need to administer. The article below will help you figure that out.
Do you provide grit (crushed granite) for your flock?
What do you feed, including...