I Beleive Cesar is an expert Dog Trainer......and those are extreme cases on his show. I don't think he specializes in a particular breed, Yorkies or otherwise? A dog is a dog. All Yorkies have the same traits, I have learned this through YT. I used to think I had unique problems but after being on this site I found out they are all similar. Luckily, I found Yorkie Talk or I wouldn't have survived my first Yorkie and moved on to a second one-female at that.
I have had many dogs and actually a larger one is easier to control than a smaller one w/c is much quicker, more fiesty, more intelligent!
If I could afford him I would send them too.