That's a tough one and a little hard to figure out. She's afraid of big dogs, but a bully with little dogs. Confusing.
Here is the website to the Dog whisperer. You might bge able to find fsomething on there.
http://www.dogchannel.com/dog/expert...aspx?WT.srch=1
Also you might try PMing yorkiek9trainer. She might have some suggestions.