One thing you
might try is peanut butter, what better for the Pnut right? You just have to watch the amount bc it's VERY high in calories. Sprocket will do just about anything for peanut butter, LOL. If you can get him to eat it and that's the biggy, try a pill instead of the capsule, because a pill can be cut up into real small bits and hidden better for picky eaters, I know this one

, I do this for Sprockets heart worm pills. Might work who knows, good luck