I agree wih everyone else wait until 12 weeks and then bring her home. I also don't think 1.6lbs at 6 weeks is really small (in comparison with other breeds yes). Georgie was 1lb when he came home at 10 weeks. Georgie was the runt as well and has had some health issues but I think that had more to do with the breeder than his size. So much depends on having a reputable breeder. Best of luck in your decision!

Tiny Puppy
 

I agree with everyone else. The puppy needs to be older. However, she is not particularly tiny at that weight. If she comes from a good breeder and is healthy, I dont find that the tiny ones are a lot more trouble to care for. The one thing that you have to watch for is hypoglocemia and if there is diarrhea or vomiting you need to get them in asap since they are smaller and can become dehydrated quickly. Overall, I have had no more problems with the small ones than the larger ones.

You need to consider that many of the puppies that come from places like this have genetic problems that do not show sometimes until years later. I guess you need to consider if you are able to deal with expensive health issues that you could be facing down the road. What if the dog ends up being bigger than what you wanted. We have many people here on YT whose puppies have grown to be over 15 pounds even though the parents were much smaller. Is that OK with you? People who breed like this have no idea of the genetic background of the animals they are breeding. That is why it is so dishonest for them to promise you a certain sized dog.
Most of the time people choose to buy the puppy despite the warnings. It's like throwing the dice.

I agreed whole heartedly with the other posters who have advised you to ask that your pup remain with Mom until 12 weeks of age. I would insist actually, I have heard many stories of the difficulty owners have had due to early seperation. I always worry when I hear of a breeder offering pups to take home so early. I am actually wondering about the breeder. Did she mention a health guarentee? A guarentee of at least a year is important. Also did the breeder mention that you can take her into your vet for a health check? Its vital that you have time (usually 72 hours) to have your pup examined by your vet. In the event that the pup does not pass her health check you would be able to either select another pup or have your money refunded. If you have a contract I would look it over carefully and if there is no contract again a red flag would go up for me.

I am not really alarmed by her size, she isn't REALLY small--well for a 6 week old Yorkie lol. I hope that everything works out and that you soon are another lucky mom of a Yorkie :) :) One more thing, her coloring looks great, Yorkies are black and tan but change as they mature. Chloe's coat has changed once and now at 3 her coat has changed again :)

So very glad that you are asking questions and doing your homework prior to bringing your little girl home. Welcome to YT!!