I have to use two pads for Joey, as he will not poop and pee in the same place. Don't ever scold, you can move the poop to another pad, so he'll get the idea. Scolding can cause them to start eatting their poop because they want to hide the evidence. Remember Yorkies are harder to train than most breeds, and if he's using the pee pad at 12 weeks at all that's wonderful. With Yorkies, it best to reinforce the positive and ignor the negative. I also put the Pooping pad in a more private area because he seems to like his privacy when doing the deed.