Change Shape (Su) A kitsune can assume the appearance of a specific single human form of the same sex. The kitsune always takes this specific form when she uses this ability. A kitsune in human form cannot use her bite attack, but gains a +10 racial bonus on Disguise checks made to appear human. Changing shape is a standard action. This ability otherwise functions as alter self, except that the kitsune does not adjust her ability scores and can remain in this form indefinitely.
So say I take the birthmark trait and play a kitsune, would the birthmark be present on both my human and kitsune forms? .
Along the same line of thought would it be safe to say that the birthmark is present on the fox form you gain from this feat:
Fox Shape (Kitsune}
You can change into a fox in addition to your other forms.
Special: A kitsune may select this feat any time she would gain a feat.
Benefit: You can take the form of a fox whose appearance is static and cannot be changed each time you assume this form. Your bite attack’s damage is reduced to 1d3 points of damage on a hit, but you gain a +10 racial bonus on Disguise checks made to appear as a fox. Changing from kitsune to fox shape is a standard action. This ability otherwise functions as beast shape II, and your ability scores change accordingly.
The fact that the appearances are specific and static I'd say that the birthmark would be present on all forms.
