PetLover’s Crunch Milk Chicken dog biscuits have Fennel. Fennel is high in vitamins C and A, calcium, iron, potassium, and varying amounts of linoleic acid. Fennel helps increase appetite, and freshens the breath PetLover’s Crunch Milk Chicken dog biscuits have Flax seeds. Flaxseed is naturally rich in natural fiber and assists in healthy digestion. This is especially important for maintaining a healthy weight and keeping your pet regular. Flaxseed is also a top source of lignans, which can be an excellent antioxidant for your pet. PetLover’s Crunch Milk Chicken dog biscuits have Zinc. Zinc plays an important role in many substances in the canine body including enzymes, proteins, and hormones. Zinc is also important for immune system function and thyroid function.