[abbey lee]

I would say outside. Especially if you have the time to do it. IMO, most people use the pads bc they can't take the dog out all the time... It is a good habit to start early. Why would you want to have poop and pee inside even if it IS on a pad, still yucky. I would rather have a dog who uses the bathroom OUTSIDE. And maybe since you are training the yorkie you could take the other dog out with you too all the time and they will both learn to potty outside!

Good luck!! (I'm potty training right now too!)