Dog Breeds Japanese Chin

i have a Japanese chin (its a breed of dog) its hair wont grow Help?
Japanese chins are supposed to have long beautiful hair.
its a seven month old female that has not been spayed
it can take up to 18 months for a full silky coat to grow. if the dog is over it’s age, it may need to see a vet to determine why it’s coat isn’t thriving (it is usually a nutritional deficiency ie bad diet)
Japanese Chin Puppies