If the three-month-old golden retriever has just entered the normal shedding period, the owner does not need to worry too much. You can use a pet comb to comb the dog's hair every day, and choose high-quality pet shampoo or bath to prevent harm to the dog. The skin will increase hair loss or induce skin diseases. It is necessary to strengthen indoor cleaning every day, especially the hair in the corners. If it is caused by a skin disease and the hair removal is accompanied by symptoms such as skin redness, swelling and itching, it is best to go to the hospital for treatment in time.