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The average lifespan of the Yorkshire Terrier is 13 - 16 years. The lifespan of any dog will depend on several things including but not limited to the pedigree of the dog, the fitness of the dog throughout its life, when the dog was spayed/neutered, the quality of food the dog eats throughout his/her life, and the preventative and/or curative care he/she gets throughout his/her life.
Some dogs are more waxy than others, I have a female whom is much the same as your dog. Something to think about is to go to a local groomer that you trust and ask them what they use to clean and prevent wax build up. I use a special ear cleaning solution and then have clipped the hair around/in the ear a little shorter than normal to allow for more air flow. I also just make sure I clean her ears at least once a week so that I stay on top of the wax build up.
No, there is one set standard for the Yorkshire Terrier. However, some breeders may advertise their dogs/puppies as 'Miniatures', 'Toy', or 'Extra-Small' to entice people to buy from them. But for the dog to be register-able, both parents must be on par with the set standard of the breed.
The Yorkshire Terrier only comes in one coat coloration. With her been all golden, she is most likely not a purebred. She could have Norfolk Terrier in her, which would give her the all golden coat. If you are interested, you can purchase a dog DNA test from your vet or online and have her tested. The average price is $50.00 - $75.00 for it to be done.
Yorkshire Terriers have hair, and no undercoat. The hair grows continually (like human hair), and as such is hypoallergenic. Their hair requires daily grooming if allowed to grow long and silky. This information can be found repeatedly and universally.
Only one coat coloration? They now register Parti colors through AKC. If you have enough down line colors in both parents you can get chocolate parti's, blonde parti's and blonde's chocolates...they are all registered in AKC...You do have to send in a picture with your registration, but they except them and register them.