OATS:

 

Vitamin B to helps maintain a healthy coat 

Linoleic acid, which is an omega-6 fatty acid that helps maintain the strength of a dog's skin, also iron, zinc, and other minerals. Oats support a dog's coat. They have Soluble Fiber that promotes digestion and weight management as well as Vitamins E, K, B6, and B9, also known as folate.