Just an update.
Good news, no further deaths, and all meaties are sitting normally with their legs under them. I haven't seen any trouble walking since yesterday morning. The meaties have adapted to the fermented grain beautifully. They are hungry, and happy to eat at meal times, and there are no issues with bulging crops and tummies. Their crops are full after meals of course, but not like a few days ago where they were 100% stuffed all the time.
The layers are more active this morning, and moving well.
My heart is happy!
Great news!

MrsB