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Originally Posted by thelittleyorkie  Those were two separate questions I was asking. (also i was typing on my phone so I couldn't go into much detail) Isn't a Yorkshire Terrier a Small Breed and a Toy Breed? |
Your answer is yes to both. Toy breeds nomenclature is probably sourced from the conformation or show environment. Small breed is a more generic term that is in public use.
Different organizations may classify small/medium/large/giant etc to their own definitons which is by no means universal. Usually done by weight ie: small is 25lbs medium 25+-50 large 50+ to 75 large 75+ to 100 etc.