The reasons why dogs shake their hair:
1. Dog shaking can shake off the dirt and moisture on the hair, making itself refreshed.
2. The shaking hair may also be due to itching. At this time, the owner can also pay attention to the dog's skin.
3. It is also possible that the dog shakes its hair in order to relieve negative emotions such as tension and anxiety.
4. During the moulting period, dogs will remove part of their body hair by shaking their hair.
5. It is also possible that the dog is infected with parasites that cause the hair to shake.