Here is the link to Henry's pets page.
You can read up on healthy diet and MBD, symptoms and how to treat.
Does their diet include a rodent block or just the foods you have listed?
The formula they have been on could be a factor as well.
https://www.henryspets.com/henrys-healthy-diets/
Keep checking back for more help and keep us updated on your boy.
Is he still bloated?
A scale to weigh him will definitely be needed in case he ends up needing meds.
Pictures can also be very helpful.
Could he have gotten into something that made him sick? How long ago did his symptoms start?