I don't see a problem either with feeding the prescription food for a few days. It's when vets insist you feed it to them for life that I take issue.
Hopefully Monkey gets better now! I wonder what the heck is going on inside him. Scary indeed.
"To close your eyes will not ease another's pain." ~ Chinese Proverb
“We must not refuse to see with our eyes what they must endure with their bodies.” ~ Gretchen Wyler