If they were in a cage inside, then you could better monitor how much they are actually eating on their own. They start by pecking at the seed, but aren't really eating enough if any at that point. Watch to see how much he is eating, and if not enough than you supplement. When a hand reared baby starts to wean, Let him eat on his own in the morning. See how well he does by how much feed is gone, and how much he is pooping. If by noon he hasn't eaten all that he should, then feed him. Then give him an amount of seed and check it at the end of the day. If he hasn't eaten what he should, then feed him the 30 peas. You want to encourage them to try to eat, but can't let them starve because they aren't eating enough, or dehydrate because they aren't drinking.
Keep dipping his beak into the water, but not over the nostrils, until he learns to drink.
If they were eating and not drinking, then that would kill them. By leaving them outside, you don't even know if the crops were emptying. The same food could have sat there in the crop for days. How would you know any of that if they weren't in cages being monitored. You don't know what they were eating or drinking or pooping.
I would check way down this little ones throat with a flashlight to see if there is anything down there. All this stress can cause canker, and he isn't feathered out under his chin yet. He should be.
