Teddy dogs have straight or curly hair when they are young. When they are just born, the hair is relatively short, so it does not look so curly. When the dog grows older, the hair will become curly. Under normal circumstances, Teddy dogs will start to curl around three months old. It is best for the owner to comb the dog's hair every day to avoid tangles, and Teddy dogs need to be trimmed regularly so that the hair will get better and better. .