I had a similiar problem with Nikka. She's extremely picky and eats when she feels like it not when I want her to. I can't leave the food out since Bear is on a diet and if left out he'll wander around and finish everyone elses bowl as well. In addition Nikka is exteremly energetic and part pointer so already runs on the very slim side because of body type, so any skipped meals and you know it. I now feed Canidae and she loves it, but I went through about a year of trying just about every food (even the cheaper lower quality food (I was desperate)) Before I found Canidae I started adding sauces, some sort of gravy, or even soup broth to the food (, not much, and usually low fat and not heavy, just enough that it coated the food and made it more appealing to her). You might try keeping the same food just alter the type of coating/sauce you put on it so he wont' get bored. It's usually easy to do/inexpensive and you can make it in advance and put it in the frig. For me it worked well until I found a food she'd eat.