Fido Pet Belly Bone Yogurt Dog Bones are a good source of prebiotics and probiotics. Prebiotic stimulates the growth of healthy bacteria known as Probiotics. Probiotics help maintain the natural balance of microflora in the gastro-instestinal tract for healthy digestion. The unique V-groove design is easy to hold and massages gums & teeth. Belly Bone Yogurt Dog Bones contain natural ingredients like antioxidants, omega fatty acids and essential amino acids. They help to support a healthy immune system and enzyme production.