The main reason why dogs need to lose their fetal hair is to maintain good hygiene and health. Lanugo hair refers to the first layer of hair that grows after a dog is born. This hair is usually softer, finer and more tangled than the hair of an adult dog. It can easily trap dirt and become a breeding ground for parasites and bacteria. Excessively long lanugo hair may also affect the dog's vision and mobility, leading to health problems such as skin itching, inflammation and infection.
Therefore, it is necessary to cut the dog's fetal hair regularly. The frequency of fetal hair shearing varies depending on the dog's breed, age and hair type, but it is generally recommended that the dog be sheared between 6 months and 1 year old. If you are not familiar with how to properly trim your dog's fetal hair, it is best to ask a professional pet groomer to help ensure that it will not cause adverse effects to your dog's skin and health.