Withers Currently Bugged

It's been brought to our attention that Withers is currently bugged. This pet is not responding to nearby water sources and regrowing to its full size as intended.

Get Well Soon Withers!
It appears that the bug was first reported back in December 2011, and although there hasn't been any official comment or word from Blizzard about the status of Withers, we remain hopeful and confident that developers are aware of this companion's ailment and that it will be addressed in a future patch.