So I did want to draw both of em at same picture.
It's down with pencils on a2 paper and there's, here's, a link to making-of video.
back to the subject. I've drawn lot's of both, more dragons I must admit.. and I did have a need to fit em both to same scene even that I haven't ever read or heard any story with both of em in.. well.. Tolkien did write world where was both but I don't remember that they would have in same... scene ever.
so Yeah. I draw this... I wasn't sure are they friends or enemies so I made it so.. that watcher may decide. I see it right now in both ways.. they might be having fun or seriously giving a beating.