Meat-based treats are best for dogs. Most commercial treats are grain-based. But, treats with meat in them more closely match a dog's natural diet. Top-quality, whole ingredients are best. These would include oatmeal, rice, vegetables, fruits, nuts, and eggs.
Organic ingredients are the best.
That's because pesticides are in our foods, even if they are not listed as an ingredient. Our dogs are unfortunately exposed to LOTS of toxins in their short lifetimes. The best we can do for our pets is to try to reduce their exposure to whichever toxins we can. Natural, food-based sweeteners, such as applesauce, molasses, or honey are best. Now, remember, in an everyday dog food, we wouldn't want to see any sweeteners.