Well, I feel for you. My last two dogs were both horrible to feed.
Baxter and Bentley started to get that way too, and that's when I started cooking for them instead of buying every kind of dog food under the sun to try to get them to eat.
Another thing that we do differently with these guys is treats are just that, treats. They get high quality treats once in a blue moon. A bag of treats lasts us months, not days. Once a week they get a bully stick each and on Sunday mornings when my parents come over they get a few of their other treats, but that's it.
They totally clean their bowls at dinner time now and it's wonderful.
clm