Dog hair grows at different speeds depending on the breed, age and diet. For example, a Yorkie puppy doesn't have substantial hair growth or need a hair cut for at least the first 16 weeks. After that, a Yorkie needs to have its hair trimmed at least every four to six weeks, which differs from other breeds.
Diet plays a significant role in how fast a dog's hair grows. Owners need to create a diet that is rich in omega fats, including omega-3 and omega-6 fatty acids. This not only helps hair grow faster, but it also helps the dog's coat develop a healthy shine.
Besides just providing a dog with a healthy diet, owners also need to maintain pet hair to help it grow faster. This includes, but is not limited to, brushing and shampooing a dog at least once a week. Brushing a dog removes debris, dirt and dead hair that gets caught in the animal's fur. The removal of dead hair stimulates the growth of new hair. Shampooing the dog also removes bacteria from the skin that often hinders the growth of hair.
Dog owners can make their own dog shampoos to kill bacteria that inhibits hair growth. One such homemade shampoo includes mixing 1/2 cup white vinegar into 1/2 gallon of water. This mixture should be sprayed on the dog until he is wet.