Yes to the stubborn, but not defiant. If they aren't learning then you are not making yourself understood.
Don't keep repeating what you are doing and expecting different results. If what you are doing, is not working, than you need to try something else.
It is never too late to go back to the basics, such as keeping them confined to a small area when you are not able to supervise them.
When confining to an Xpen it might be necessary to make some sort of divider in it to partion off a potty area as they might not want to soil their living quarters.
Some people have had success with weekend bootcamp. Where you keep your yorkie on a leash and tied to you all weekend.
Or you could try crate training. |