[107barney]

No way. I'd never train a yorkie with anything other than positive reinforcements. I have clicker trained my dogs and it is extremely effective for teaching new commands and for reinforcements. I have never used any aversive methods and I question whether the use of something like this e collar with our stubborn and independently spirited breed would actually cause other issues. In my opinion, a yorkie is best trained with positive rewards done daily in short bursts over its lifetime.