Hi Kathryn!
When we were talking the other day, I know you told me that she had brown ticking, but I assumed you meant on her skin....these spots are in her coat, aren't they?
I have never heard/seen this. Hopefully, some Biewer folks can answer ya. Her size does seem small, but like the other poster said...maybe slow growing lines.
I hope you can get this figured out.
Tammy