Kirsten just got back from the vet's with Heidegger... apparently he's healing up just fine.
But we did find out he has another condition we didn't know about:
Obsessive Licking Disorder. I kid you not.
The entire time Heidegger's been in his cone, he's been very steadfast about keeping it clean... he'd often sit there for minutes licking the inside of the cone. We just assumed that he was doing it because he couldn't groom anything else! ;)