Pet food process line endues pet food with the amount of nutrition, digestible structure, novel shape, and unique taste to meet with theneeds of modern market. The dog chewing food is extruded into a variety of shapes such as stick, bone, etc. This kind of food not only canprovide nutrition to dogs, like protein, fat, vitamin, etc, but also satisfy the dog nature hobby, benefit to its strong teeth, cleanness of mouth andteeth, and prevents disease