Again, to each his own on shipping a puppy but I would NEVER ship a 12 week old yorkie puppy whether it's been done by others or not. You can not control their trip in cargo and flying in the cabin you can. If the puppy were to get hypoglacimic you'll have something on hand and in cargo you wouldn't.
But this is the way I do things and nothing will change my mind on shipping a small yorkie puppy. No offense to those that do but this is my opinion! Let you conscience be your guide
Donna Bird
Brooklynn's Yorkshire Terriers