Hi, im jacky. Im new and i had a couple of questions about yorkies

I turn 15 this october and ive been hoping to get a yorkie for my birthday, and my parents finally said yes
well, 1st i was wondering what food is best? wet/dry? and what brand?
2nd, Does it really matter if your yorkie's ears are up or down?
3rd, Whats better collar or harness?
4th, What the perfect size crate?
5th, whats it a list of YORKIE ESSENTIALS? or things that are a must for a new yorkie owner
6th, In your opinion, is putting your yorkie in a doggy purse and taking her to the mall bad for them? id love to do it with my doggie so she doesnt have to stay at home.
7th, I checked up with my future colledge and they do accept small dogs

,i just started my sophmore year now, but is there anything i should know about keeping dogs in dorms?
id love any other tips, advice or anything. I know usually when i say im 15 and my parents are getting me a yorkie, most people cringe, but i really am a dog person

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thanks in advance,
Jacky