First and foremost, your dog needs a high-quality diet to support fur growth. Fur is a part of your dog's body, and it needs nourishment and care to shine. A poor diet thus leads to poor fur growth and an unhealthy coat. You may also consider adding fish oil to your dog's diet. Fish oil is high in omega-3 fatty acids, which are well known for their role in supporting healthy coat growth. As always, make sure to consult with your vet if your dog's health changes. Hair loss can be a sign of several different problems, including stress, parasites, and conditions like hypothyroidism.