How are you brooding these chicks?
If they have light 24/7 then the crops may look full when you are checking on them since chicks will eat around the clock.
Looks healthy to me.
Check the crop when they eat, then wait until they take a nap and poop, etc. Check the crop when they wake - you...
If you are feeling water and grains, then it's the crop.
Where are you located in the world?
What exactly are you feeding, do they have grit?
Photos of the chicks from the front and of your brooder.