If his breath got icky after switching to Diamond Naturals, I’d definitely find something else. I feed mine VeRUS Life Advantage and don’t have any trouble with stinky breath (and I have an 11 y-o Golden). Even when I fed VeRUS’ Opticoat made w/fish, my dogs didn’t have stinky breath. VeRUS will send you free samples if you contact them. Tell them what you’re experiencing and they’ll recommend a formula or two for your dog & send free samples. They’re really good at answering questions, too. They’re are veruspetfoods.com.
