Roxy is 13 and 6 months. Thought we were going to lose her a couple of months ago. Stomach/Intestinal issues. We thought it was time until vet said "I can fix that. Vet gave meds and changed diet...now its like she was never sick. Back to her old self.
I have to agree with the seasonal comings and goings of hair loss though there was no real pattern to when it occurred. She'd lose some hair in patches...never bothered her...it'd grow back...she lose it again, it'd grow back again. But when we moved to Vegas several years ago it stopped.