When a dog is about two years old, its coat color development will be basically stable. A two-month-old dog will mostly have fetal hair. When the dog reaches four to six months old, it will start to shed its hair. The hair color development will not be basically stable until the dog is about two years old. During this period, you can add some lecithin, nutritional paste, egg yolk, etc. to the dog's diet, which can help the dog's hair grow.

Before the dog’s coat color stabilizes, owners can make the dog’s hair healthier in the following ways:

1. Owners can supplement their dogs’ nutrition, get more sun exposure, Grooming and other methods can help your dog's hair grow smoother and lusher.

2. Lecithin, nutritional paste, egg yolk and other foods can be added to the dog's diet, which are beneficial to the dog's hair growth.

3. When bathing your dog, do not use human cleaning products to bathe your dog. Long-term use will affect the quality of your dog’s skin and hair. In severe cases, it may also cause skin damage and skin diseases.