Thrive Dogs Thrive treats are 100% Pure & Natural and this pack has nothing But 100% freeze dried duck necks. Duck necks contain calcium and have an intense flavour which helps your dog to focus on you. Ideal for dogs sensitive to certain foods. Duck necks are completely free of derivatives, preservatives and other questionable things, just compare our ingredients to those of other dog treats. 100% Duck, 0% Nonsense. Our dogs are our family so we only use ingredients of the finest quality.