Keeping my fingers crossed that he does better with just the Hills food. I was hoping to read that he was back to his normal self today

I can imagine that you are very worried and frustrated! Is there such a thing as an Internal Medicine Specialist for animals?
Reglan was mentioned and I thought that sounded like a good idea. I am on Reglan for my stomach (gastroparesis) and it literally saved my life. Before I was diagnosed as diabetic, I felt so sick for a long long time and couldn't eat but a bite or two at any time. I lost about 40 lbs in a few months, before I was diagnosed. I got my sugar under control and still couldn't eat so the doc gave me Reglan, it was a miracle! Too bad I gained back all 40 lbs though, I could have stood to leave off 20 of that
Praying for Tibbe and you