Im curious, because i read up alot about the breed and i keep coming by a phrase that says a full grown yorkie should be 7 pounds... but my boy "yorkie" is only 5 months and at 6 ponds already. the vet says he might be almost 15 at full maturity. my question is: if my dog is so big compared to the standard, does that mean he must be mixed.. i do have papers, but how can i be sure theyre correct? i have some pictures of him on here - feel free to look. he looks like a yorkie, but can they get that big?