Thanks for the advice.

Actually, he came back from the vet yesterday. The vet didn't feel that
it was necessary to hospitalize him, and wanted to try him as an
outpatient at home with the antibiotics and Lactulose.

He is very uncooperative with syringe feeding of his medication, and I
hope I don't have to resort to syringe feeding him food as well. Now,
he is very wary of me approaching him, because I have to hold him very
firmly in order to give him the medication.

I will try the tuna and chicken baby food tonight and see how it goes.

Thanks again.