Duck Skin in Hamburger?
Raw or rendered duck skin?
My only thought is that the raw duck skin ground into hamburger may turn out stringy. Also, do you need to cook the duck skin to 160F?
However, give it a shot, you may have the new sensation. 
Reading More May Cause Envy…
About Me
I love food. Unfortunately, I can't cook worth a damn. I've been known to even burn water.
When I watch chefs and good cooks on tv, I'm so envious of their skills. This blog is the closest I get to cooking, other than the microwave ;)
Try not to drool!
John, New Englander turned Cali dude