Hi Nan,
Your pup definitely could do well on a homemade diet that’s low in fat and high in high quality protein. It’s critical though to make sure a homemade diet is properly balanced.
Here is a great website with lots of information that could get you started: http://dogaware.com/articles/wdjlowfatdietsamples.html
Here are some suggested low fat foods: /best-dog-foods/suggested-low-fat-dog-food/
If they’re low enough in fat for your boy, some I think are excellent are Orijen Senior, Go! Fit and Free Senior, Wellness Core Reduced Fat and Nature’s Variety Instinct Healthy Weight.
Good luck!
