Don't think of the feet think of the shape of the legs and the style of walking.
I know I know, was just pulling the goat... err leg.
But remember that in Morrowind beast races could not wear footwear of any kind.
If they do add them, and ensure footwear compatibility, the footwear will probably need fancy meshes to work right, which could be a problem for modding.
Or maybe not. Maybe the footwear models get divided in two parts, 'feet' and 'ankles'. Beast races would always overwrite the 'feet' part with their feet models, but the 'ankles' remain in place. Like how in fallout the armors got the forearm severed to make place for the pipboy when worn by the PC?
But I still think you would need to forget about argonians with fancy dancing shoes...