I didn't think they were descended from the Canis family but I haven't seen anything that suggests human DNA- you've just come up with a wild conspiracy theory there.
But the Wolves of Fenris pre-date the Wulfen by millenia other than wolfish aspects what actually connects the two?
Been doing some googling around, and I don't seem to be the only one who thinks so.
The first Space Wolf legions were from Terra (Pure geneseed, no Fenris natives) I am 100% certain they were immune to the Wulfen.
If that is so, then it is something endemic to Fenris which causes it.
Hmm, what could that be ?
What I am thinking is that a native predator on Fenris was spliced into Human DNA for whatever reason. eg. Hyper aware senses, resistance to cold, as happens in all things, some of the splicing went awry and the "Fenris Wolf" is the result. Not a native animal, not a pure 'dumb animal', but something different. So different that I am sure the Ordo Hereticus would have long words with the Chapter Master.
I am aware I may be totally off base and in-correct, but based of the little I know of the Wolves (Chaos damn them), and of the 1K sons from the HH book, I stand by by statement until someone steers me different.
Aside from that.
When the Emp said all "Librarians/pskers" should go back to being regular battle-brothers, I suppose the "Wolf Seers" thought themselves exempt ?
nb. I don't really hate the Ulties, just dislike their Primarch. They are serving a purpose as Tyranid chow, so I am well satisfied.