I don't believe they still treat Chinchillas, at least, when I called 2 years ago they didn't. Plus, the area code has changed, so I believe it's old. However, here is one that does:
Dr. Sari Kanfer
Dr. Domotor's Animal House
135 W. Foothill Boulevard
Monrovia, CA 91016
(626) 303-7881
She...