Spooncraft

About the Devilsaur pet size

The devilsaur is an exotic pet that will ultimately require 51-BM to tame. There are several other exotic pets that are not implemented yet. (The moth is not an exotic pet.)
The size of the devilsaur is not a bug, but I also can’t promise it’s going to stay that way. It would be awesome if it did, but only if it doesn’t cause a bunch of other problems, like clipping through terrain and making it impossible to see mailboxes in Dalaran. (src)

Images courtesy of Sean from and MMOC