Nice Wolf

Yeah! Niju does look like a cat sometime!

Well, since all you pessimists are here, let me be the
silver lining. Perhaps Niju was made catlike because it's a
classic routine to have feline villains in dog movies. For
example, the demon named Red in All Dogs Go to Heaven 2
(also a Universal movie, lending credit to the comparison)
is a cat, and one could even say there is some vague
resemblance between him and Niju. Also, the Road Rovers'
archnemesis, General Parvo, was secretly feline. So perhaps
the animators were just trying to subtly tap into a classic
story element.

The animators suck! Nothing like the original artists from the
first movie.

Yes. They basically made it for the money, not for
entertainment.

I guess you haven't heard yet. The Wolf Quest animators were
not good. At ALL. They didn't spend much time in the making
of the movie, so their animation won't look too great. So Niju's cat features most likely were the effect of this