Don't panic, be patient and treat it and it will be cured. First, the owner should shave the hair around the damaged skin of the dog, use salt water to clean the areas where the ringworm is on the legs, and clean up all the skin flakes or scabs. Then use pet-specific anti-inflammatory or fungal drugs to spray and treat for a few days/months. After a few days/months, new hair will grow in the area where your pet has ringworm.