I too, smiled when I read the pre-1920 yorkie description. What a happy little dog, with a purpose for life!
Even though I love my little 5 pounder, and the smaller ones are adorable, it almost seems unnatural to keep breeding such small babies. What next a 1 pounder? How cute - it fits in my shirt pocket

And don't think for a second that that little 3 lb yorkie with the little fru-fru dress would not love to dig a big dirt hole or kill a mouse.
My husband says all the time that he feels sorry for Bonnie because I won't let her be a dog. But I can't because she is too small and I worry that she might get hurt. I do feel I don't let her have any "fun" because I am over-protective.
Chewing on a bully stick is no substitute to running free and catching a crow. LOL