With only 2.7 calories per puff Boss Dog® Brand BOSS PROPUFFS® are Ancient Grain-based treats formulated to give your dog an energy packed solution loaded with Probiotics! 500 million probiotics (per ounce) to be exact. Free from corn, soy and wheat, you can rest assured that our Boss PROPUFFS® deliver digestive benefits and contain wholesome ingredients. These treats, filled with our custom savory/sweet fillings, and seasoned with our proprietary spice blend are sure to be a hit with your dog!