There are many different factors that determine how fast your dog will grow new hair. Some breeds shed more than others. The length of your dog’s hair also plays a role in this equation. If you want your dog to grow back their hair as quickly as possible, the best thing you can do is make sure their coat is kept healthy. This means brushing them often and making sure they don’t overheat. You should also give them regular baths to keep all of the dirt out of their fur. You can also use a grooming tool like a comb, brush, or a rake to help loosen up the knots and tangles in their fur. When you do this regularly, it will help them stay cleaner and less smelly too! Another way to speed up the process is to trim their excess hair. While this isn’t good for their health, it does help them look better. If you cut their hair too close to the skin, it will cause irritation which can lead to more shedding. Make sure you leave enough hair to cover their body without being too tight. As long as you take care of their coat, they will grow new hair much quicker than if you didn’t.