My rudy is the pickiest of eaters. He is 1 year old and barely weighs 3lbs. So in February I Went to a Dog Show and they had samples that they were giving out. It is called Deli Fresh. To me they look like little meatballs! But he absolutely loves it.
I make sure he runs around a lot and builds up an appetite otherwise he will just pick at his food. Fingers cross he still likes it in a couple of months.
Good luck with your little one!