My Sampson eats only human grade food. His tummy freaks out if his diet is changed at all. It is a soft food and I am worried about his teeth given the propensity for Yorkies/Silkies to have soft teeth. I want to give him something treaty to chew on. He is very choosy so it would have to be tasty

Thanks in advance for your input.
This is what he eats daily.
Human Grade Canine Cuisine Inc.