Snooki looks like a Yorkie to me! He might be big but it can happen. Some puppies can grow alot and be big but they are just as much Yorkies as the smaller siblings.
My sister has a Yorkie that is probably around 10-12lbs, not less and his sister is TINY, she is about 2-4lbs. I know the breeder and know that there was no mixing, puppies from partents that have pedigrees that we know are right.
Sometimes the puppies are just diffirent in size. Hopefully I can take a picture of these two siblings sometime to show you the diffirence
