Jean and Butch, first off, thank you for bringing us up to speed on Butches progress. I have many diet restrictions on my Rheumatoid arthritis and diverticulitis diet so I know how challenging it is to eat the right foods for your condition.
If he has access to a nutritionist on his insurance I would jump on that as a huge resource. RA isn't one of the covered illnesses they provide help with a nutrition. It's trial and error for me. Diabetics and cancer patients luckily, (not that any illness is lucky), can get covered help in This area..
Prayers that you both stay strong and stay focused as each day passes. You are a great team and you will both get through this.
Love and thinking about you both, Christine and Tom