The crop is like the first stomach on a cow, it holds everything the bird eats to be moved down and digested at night, so it will all come up if he's excited or jostled (like a baby). :] I'm not sure on how to feed him, I've only had ducks briefly while my friends were on vacation.Oh, I heard they stored water somewhere-- didn't know it was for food! But I do think I know why he has water coming out now that you say that..
I've been putting a small amount of water in his food so he could eat it better (when he was younger) and I've been giving him dry food with a little water in it and I've noticed that his food is completely soaked when I checked on him a bit after I give him food. I'm thinking since he likes to hangout in his water and then go in his food, he gets it all wet and stores the water with the food?
I'm planning on giving him all dry food crushed up starting today when I switch his food out. I could give him a bottle of water and cut a hole in it so he can't get it in but his brooder doesn't have enough space since he has a huge heat plate. I can try a water bottle though until it's time to switch his heat plate to a different position?