He's a boss, so yes, unlikely to work.
(If you're really, really curious about whether a boss-level Core Hound is tameable, though, you can check The Beast? I'm a little curious myself, since he's in a level 60 instance...)
edit--The Beast is marked Tameable, no idea if you can actually tame him or not though.
Edited, Oct 17th 2008 5:35pm by isyris