I feed my shih tzu left over bones and some rice and stuff like that and sometimes i wonder if some type of food might give him a disease or get him sick.
i used to feed my dog table food / scraps / everything else, and now she's diabetic because of her diet. some dogs have systems that are way more sensitive than human beings', and you never know how it could affect them.
the best thing to do is to just feed it dog food. you can also try baking your own dog treats for them (they have recipes and kits you can purchase, or you can bake canned dog food). sometimes dogs refuse to eat their own food after they're used to eating human food.