I don't think so.
Is it just me or does Appa look an awful lot like a water bear? Interesting that a sky bison would look like a water bear, seeing as how those are completely different nations. But maybe it was foreshadowing of the sky bender Avatar's partnership with two water nation kids?
Thank you to Chad for having a weekly picture of Appa with baby for scale (or that the other way around?) and Ugly Overload for reminding me of the cutest polyextremeophiles around.