This place is 20 minutes from El Cajo, Ca. please call them in the morning to make an appointment for your yorkie. There are five veterinary dermatology diplomats (board certified dermatologists) there who can help you figure out what is going on with her.
Animal Dermatology Clinic
5610 Kearny Mesa Road #B1
San Diego, California 92111
http://www.animaldermatology.com/loc...atology-Clinic el cajon, ca - Google Maps
here are the derms that are located within 25 miles of El Cajon
https://www.acvd.org/locator/locations.asp?Srch=w