I would not vomit him again. You risk aspiration.
Please do not vomit him.I'm quite nervous about trying to make him vomit. Will it take a few days for the new size to help his crop empty completely?
I'm not understanding your question about the grit. IF the crop is not empty first thing in the morning before he's had anything to eat/drink, then begin treating the crop issue.
https://www.backyardchickens.com/ar...w-to-know-which-one-youre-dealing-with.73607/
Do you have a family member or neighbor that can help you with this?
The crop fills up during the day, and should normally be empty by early morning before eating and drinking. That is when to feel of the crop to check it. If you suspect a crop issue, here is a good article to read:
https://www.backyardchickens.com/ar...w-to-know-which-one-youre-dealing-with.73607/