[canana]

Originally Posted by TrainingCollars

I have a positive experience with using Dog Training Collars for small dogs. They are perfect for Yorkshire terriers, but you must use them in the right way. The useful information you can find on this link:
How to use electronic dog training collars effectively in 7 steps - Dog Training Collars

Shocking small dogs is really unnecessary.

As the above comments mentioned, positive reinforcement goes a long way. Yorkies love to please!