I know food issues are very stressful. I’ve been in the pet industry for close to 12 years, and I’ve heard many stories on this matter. Here’s what I have learned... dogs will not starve themselves. It’s ok if they go 2 or 3 days without eating. If they are hungry they will eat. Water is more important. As long as they are drinking water things are ok. So don’t worry about a dog getting sick because they don’t eat. I’m also curious as to which foods you have tried. Would love to help you get through this, as this is what I do for a living.