Thank you, Dr. Kellon!
I'll add the oats/beet pulp mixture as you recommend and will check his salt for summer requirements.  I'll also look into different protein sources, per your article, for a better variety of aminos, and maybe I can discontinue the supplement.
--
Michele & Mosey IR, Feb 2019
Reno, NV, USA
https://ecir.groups.io/g/CaseHistory/files/Michele%20and%20Mosey
https://ecir.groups.io/g/CaseHistory/album?id=88791