My dog isn't food motivated. What are the best ways to reward him?

For training purposes we sometimes will give foods not normally recommended to our pups, such as SMALL pieces of cheese, tiny pieces of cooked hot dog, or a lick of a spoon with peanut butter or EZ cheese. Some dogs also really enjoy the freeze dried liver treats such as these https://www.chewy.com/stewart-pro-treat-beef-liver-freeze/dp/44918. As long as you are giving very little pieces and your dog doesn't have food allergies or a sensitive stomach these can be good choices for high value rewards. Other dogs respond well to being rewarded with a certain toy. Many dogs, for example, are in love with/obsessed with tennis balls and just getting to catch a tennis ball or hold it in their mouth can be a reward. Another way to increase treat motivation is to give a smaller meal or wait to give a meal until after your training session. Your dog may not be interested in treats if he just ate his whole bowl of food and has a full belly!