I have a 14 week make GSD who’s been eating Royal Canin. I realize this may not be the best option for him and wanted advice on another choice. Lately he’s been itching like crazy since we switched to it. The vet thought it may be from his first bath. That was 3 weeks ago. He doesn’t have any fleas as he’s on preventative. Any food recommendations? Cost isn’t a problem and I don’t want to do raw.