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Originally Posted by GurleyGirl Where do chihuahuas come from? Think about it. 
That's all I have to say. |
I think you're comparing apples to oranges. The Chi is a very ancient breed that people don't know much about while the yorkie is more modern. Even the chihuahuas can have problems if the bitch is too small. And where will it end if we're breeding with only size in mind?
chi's
http://www.bigchihuahua.com/faq.htm#3
yorkies
http://www.barkbytes.com/HISTORY/yorkie.htm