Leaving the hair on, whilst the chew is digested, any parasites in the digestive tract cling to the hair which are then passed through. Contain Only 100% Lamb. · NO Artificial Colourings · NO Artificial Fragrances · NO Artificial Flavours · NO Preservatives · NO Additives Gluten Free Treats 100% Natural..They're Naturally Better Nutritional Analysis Protein 57.7%, Fat 29.3%, Ash 3.1% Any natural treat containing bone carries a risk of splintering. Dogs should always be supervised when eating. Fresh water should be available at all times.