Hi! Our dog is a VERY picky eater and the only thing he'll eat is meat. What can we do?
Three days without food, more exercise, and he'll eat anything! Don't worry, he won't die from exhaution. I think he just has to go through the REAL hunger like many animals do in the wild. They have to fight for food. You can even be creative and make a challange for your dog - so that he has to "earn" the food. In the wild food doesn't come to animals itself, they have to work hard for it!
One of my dogs were picky. I put her food down, if she left it I picked it back up and gave her nothing until her next feed. In the end she realised that if she didn't eat what she was given she wouldn't eat at all.

She now has a very healthy appetite Emotion: smile