My Theory about tails
I'm, trying to consider the evolution in anthro characters for a personal project of mine, and I'm wondering...
Much like how the human has a tail bone, but lost the tail, the same thing seems to have happened in the case of the animal humanoids of Arthur. In a few episodes, they showed caveman versions of the aardvarks, and they looked much more animal-like than the rounded off, cutified versions of themselves. I swear I saw they had tails there. How else would you explain how Binky the bulldog and Jenna the cat have human noses?
But as far as anthros go, they have some animals that haven't "evolved" or rather retained all animal characteristics... I.E. Pal. So clearly Nadine, being an imaginary character is a different kind of anthro than the more humaniod ones that serve as their world's version of the human race.