No, I have not heard of her. That is entirely too young for a yorkie pup to be placed. Larger breeds may be okay but not a toy breed. What was her reasonings for selling them so early? Did you get a contract with this sale? Did you get a health guarantee? What about shots and wormings? You need to get the pup to a vet. You can also get Science Diet puppy food or the Science Diet A&D to feed. WOW! I cannot believe a breeder would let them go at 6 weeks!