With my girls; bacon grease does the trick. Sometimes they get tired of the same old food since I no longer have time to home cook for them. So, I keep bacon grease in a bucket and when they decide they are going to look at food rather than eat it, I put two spoon fulls of bacon grease on it and give it back. Not once have they turned their noses to bacon grease. They gooble it up. Good luck, hopefully just being a little picky.