There's an additional complication as well. I can't remember exactly when they said it, but you can't acquire someone when they're in morph.
Funny you mentioned that. Because in Tobias' final book, The Diversion, KA broke her own rule and allowed Tobias' Mom Loren to acquire his DNA when he wasn't a true bird. What was up with that? Cause i know it was stated somewhere in the series that it was impossible to do, just like morphing str8 from one animal to another (only if you have a morph allergy like Rachel could that happen).
So i guess that's my question, why did she let Tobias' mom acquire him when there was a rule stating it impossible. Huge plot hole, and it seemed like the only way to get herself out of the corner she'd written herself into.