Teacup Yorkies is a redundant term. Yorkies are already small: they are of the standard, acceptable, and healthy small weight of 4-7 pounds, full-grown. The puppies advertised as Teacup Yorkies, then, may not yet be full grown, or may be small, tiny, miniature, or fit in a teacup at 2.5 to 4.5 pounds because some breeders are creating an animal thatサaccording to many knowledgeable breedersサis vulnerable to a number of health issues and problems.
According to those who know and urge people who want Teacup Yorkies to re-think, any so-called Toy or Teacup under 4 pounds is at risk for bone disease, as their bones are fragile; their internal organs are often weak and susceptible to failure; their teeth don't fit in their mouths, so there are major dental problems; their blood sugar levels are finicky to the point that they are candidates for comas and hypoglycemic shocks; they are very prone to diahrhea and vomiting; and often they need surgeries that many die from, being unable to withstand the anesthesia treatments.
Now, I am not an expert, but I have studied a wide sampling, so as to avoid taking information from only one person with one one year-old that is only 1.5 pounds! and consider that a complete testimony. Yes, tiny Yorkies exist. Yes, there are small Yorkies (ahem) that people are calling Toys and Teacups, but their existence does not prove there is any such creature as a healthy, viable, lifetime-guaranteed Teacup Yorkie.
One of many expressed joy over owning Teacup Yorkies. The same person, as did many others, described her/his experience to defend the point that Teacups are available and are healthy, first by saying that she/he had not had any problems with her whatsoever. But within a few sentences, the speaker did say, She's been stepped on a few times and never even whimpered, her baby teeth didn't all fall out, she also has a collapsing trachea, and coughs every once in a while.Hmmm. A full grown 2 pound dog with such problems seems to me to be proof that a legitimate Yorkie and one who doesn't have to suffer--is not what this person paid for.Another person said there are such things as Teacup Yorkies, as she has one, though she also commented that $400 seemed so unfair when she paid $1500 for hers! This is exactly what she was expected to think about the existence of Teacups so she would fork over the cash! Aha! Follow my drift.
Further, when another person expressing a desire for Teacup Yorkies asked where Teacup Yorkies come from, a self-proclaimed Doctor of Veterinary Medicine explained it thusly: Teacup Yorkie puppies come from Teacup parents. Hmm. So if you ignore the authorities, willingly pay 3 to 5 times the amount you would for an already small Yorkie, and if you believe in circular logicyou will have yourself a Yorkie or an underweight dog that doesn't deserve the health problems it will probably incur. So please do a little research and find a reputable breeder, so your Yorkshire Terrier (which you can pretend is called a Toy if you want) is one who will be healthy and happy for more than one or two years for it's whole life.