Zinc for Dogs: An Educational Guide to Its Role in Canine Nutrition Zinc is an essential trace mineral that contributes to many biological processes in dogs, including immune function, skin integrity, and normal growth. Because the body cannot store large amounts of zinc, dogs rely on their diet to maintain healthy levels. Both deficiency and excess can cause problems, so understanding zinc’s role helps owners make informed nutritional choices. Why Zinc Matters 🛡️ Immune Fun