I recently switched my picky eaters to Pet Fresh rolls (available at PetsMart, Petco, and some grocery stores - they have their own refrigeration case). The food is rated 5 stars on Pet Food Advisor and they gobble it up. I cut them chunks of it and feed it along side the kibble. It isn't cheap to feed it exclusively, but if you supplement with kibble, it's not too bad.
Riley - 8 yr. old GSD
Schatzie - GSD - at the Bridge
Raven - GSD - at the Bridge
Diablo - WGSD/Arctic wolf/GreatPyr Mix - at the Bridge
If dogs aren't in heaven, why would we want to go there?