Err, 2 points here:
(1) It is actually surprising that no one has yet demanded the existence of some catlike race. Similar to the Kilrathi or Mrrshan in settings like Wing Commander or Master of Orion.
(2) However, this thread seems to be about something... else. I'm sure there will be mods about this, Larian doesn't need to go there.
Oooh, I would LOVE that -- I guess that so many of the companions are like mercurial cats that nobody felt the need to have another one so far.
But yes, feline species are great.
Just stay away from less sanitary jokes, because Larian won't go there.