Like if my Houndoom had life orb and used super fang, will he take recoil from life orb?
I cant go to the move tutor now so I cant test it myself right now
Yes, since Super Fang is a Physical attack, you get recoil. Hope this helps!
>It does not boost the damage for fixed-damage attacks, self-inflicted confusion damage or recoil.
Source: [Bulbapedia/ Life Orb]
Now im not sure, since Super Fang is fixed in a way. It always takes 50% of the targets HP.