They'd never know.
http://www.pnas.org/content/104/10/4228.full
Bioengineering wildlife products is something my start-up, Pembient, has been working on for a while now.
Checked out Pembient, very cool idea and I hope you succeed. Also subscribed to newsletter.
https://www.thedodo.com/community/Elegirl/the-truth-about-tu...
Taking just the tip of a tusk might be the best option for evading a DNA test.