Treats are a great training tool, but even in small amounts, the calories adds up. There was a time when I would give Phoebe a treat just for being cute. Needless to say she put in several pounds over a period of a few weeks. My doggie mentor did not hesitate to remind me that dogs do not earn treats just by being cute. Point taken.
According to University of California Davis Veterinary Medicine Nutritional Support Services, Treats and additional food items should not exceed 10% of the daily caloric intake.The majority (90%or greater) of the calories should come from a complete and balanced balanced diet.
Here is a document they published that gives some guidelines on treats and how many calories they contain.
I also posted a few of our favorite Gluten Free Doggie Treats on another page.