Jonas was fed TOTW pacific stream from roughly 4 weeks until He hated it at 5 months old. He did very good on it. I did try to let him have it again recently, but I can honestly say. I have never seen a dog wrinkle his face up like that before. LOL He hates it. He makes a face and spits it out. He is on Merrick beef grain free, and he loves it. You could do the amazon.com thing, or try Chewy.com. I highly recommend them.
"A House Is Not A Home Without A German Shepherd"