ZoomaChew treats have specific ingredients included that promote digestive health, including fiber. The most recognized benefit of fiber is its important role in keeping the digestive system running smoothly by promoting regularity. Fiber adds bulk to help move food through the digestive tract.We include potatoes, rice, peas, vegetable flours and starches, vegetable glycerin, powdered cellulose, and so many more ingredients your dog will love. Lecithin is included in our products as it helps in the homogeneous mixing of ingredients, improves shelf life for some products. We want the most quality and fresh treats for your dog.Specs:Small - 10 count for dogs 15-25 lbsMedium - 6 count for dogs 25-50 lbs