The [NUMBER:X] tag does not work for body default, as a result, there are generally only 6 ribs and teeth for creatures.

I went through and individually added each tooth and rib to the body_default raw and numbered/named them as Toady intended for the NUMBER tag to work.

There are now 28+ teeth and 24 ribs for creatures using the body_default.

Instructions: Open your DF folder ->raw->objects
Drag the new body_default.txt into the objects folder. Overwrite.
This should work with other mods as long as the modder didn't overwrite body_default. If not, you must manually go to the teeth and rib entries and copy/paste them over the mod.

Feel free to use in your own mods. Credit would be nice, but is not required.