I think freeze-dried treats should be good, no grains,nothingelse added. ET loves his greenies dental treats which I gave only during grooming session and when its time for grooming, he will beg for it. Apparently its 2 calories per treat. Bag says to feed something like upto 10pcs or more per day? but I have never given that much, I restrict to 5pcs a day for ET.
Treats are super expensive, but if you don't mind the price, Evo treats are grain-free, no corn/soy/by-product, and its super tasty. I decided to buy Evo Salmon & Herring kibbles instead and ET still loves it, he can literally dance when I hand feed him, I call it the "Lion Dance".