I am 100% sold on supplements and have been for 40 years, that’s about how long commercial dogfood has been going down hill, crash landing really. Buy the best dogfood you can afford and add a good supplement like Rogue. I feed 3 (Origins, pumpkin & Turmeric) of them and have the healthiest coat on a German shepherd as I’ve seen. He is jet black and so healthy looking a shiny blue-black, people think he’s 3 and he’s 8. Pay for dogfood and supplements or vet bills - your choice. But don’t let your dog suffer.