It's going to be a little more difficult to potty train her since you brought her home so young. Yorkies should be twelve weeks old before going home and a good breeder has usually already started training them to pee pads. The puppies have their mother as a model, too, and learn from her.
You can't expect a puppy that young to be able to hold it all day. To be blunt, I'm sure you use the bathroom during the day. What has probably happened is that she has gotten used to going whenever she feels like it in your kitchen because she has no alternative. If you work during the day you must give her a place to go while you are not home.
You may not like pee pads, but unless you can get a pet sitter to come in during the day, you really have no choice. You need to train her to use the pads, though. You mention you can only scold her when you catch her in the act. That right there tells me she has too much freedom. You must supervise her 100% when you are home even if it means leashing her to yourself. Take her to her pad on a schedule, after she eats, exercises, wakes up, etc. When she goes, praise her like crazy and give her a treat immediately so she makes the connection between the behavior and the reward. Dogs respond much better to positive reinforcement than they do to scolding.
As far as the size of the area, yes, you need to restrict her area more. Keep her in an x-pen while you are gone. Only when she is reliable about using her pads can you expand her area. |