It’s great to be proactive, especially with a breed prone to pancreatitis.
In addition to those foods Sandy already suggested, I’d throw out Petcurean products as a suggestion. I was originally going to suggest Go! Senior, but the protein is higher than what Billy does well on. That brings me to Petcurean’s Now Fresh line. Great products with fresh meats only and no meals. The Now Fresh Senior has 24% protein, 10% fat and 341 kcals per cup. There are likely other Now Fresh products that would also met your criteria.
