Pomeranian (detailed introduction)

　　A dog's tail wagging represents their friendliness towards you, but dog owners actually know that there are different kinds of tail wagging, and often the faster the tail wags, the more excited the dog is. What is the reason for this?
　　The movement of a dog's tail is closely related to its sense of smell and specialized anal glands. The anal glands give each dog its unique scent. An excited dog will wag its tail to spread its scent; a frightened dog will conceal the anal glands, no longer releasing scent.
　　The frequency of tail wagging reflects the dog's health and excitement level. The faster it wags, the more excited and healthy it is; when wagging slowly, it indicates some excitement but poor health conditions. For hunting dogs, police dogs, and military dogs on duty, the meaning behind their tail wagging is even more profound.