Less kibble and more green beans works for my dogs. They get 1-1/2 cups of Eukanuba with 1/2 can green beans a day. They get lots of green peppers and apples. Then there are salmon skins a few times a week too plus daily salmon oil. 4 cups a day is way too much. If you feed him less he will be happier and healthier. I know that Eukanuba may not be the best food by some people's consideration, but my dogs have done well on it for years.
Good luck and enjoy your new home!
~ Stacey with Hunter, Lucy and Riot, missing Reilly, Tiger and Pennie