Under normal circumstances, the black Teddy will slowly turn from black to gray due to genetic inheritance. In addition, lack of nutrition, old age, pregnancy, and improper care may also cause the black Teddy to change color. The owner must make targeted adjustments based on the specific situation. For treatment, you should strengthen the dog's diet management, feed some lecithin appropriately to promote hair growth, and use shower gel correctly when bathing the dog to avoid irritating the dog's skin.