Hi,
I think we're leaning away from the shield. Here is a comp we really like
http://www.perfectpatients.com/chiropractic/websites/1103L/chiropractic-websites/chiropractic-logos.htmlit's sample 12
We like the colors and the flow of the spine (circles) can you work this up with a few variations?
-no serif fonts
-similar colors to the sample or a little bit more muted.
-gard either a thinner font face than chiropractic, or slightly smaller is about the ratio we're looking for.
thanks,
Aliya