Per http://pathfinder.wikia.com/wiki/Desna
I don't know if a petition would be accepted in favor of adding ferrets as animals associated with The Tender of Dreams, but for her Domain of Chaos, and her nature of Chaotic Good, ferrets fit right in! So I would ask if the material ever gets an update (Animal Archives), ferrets make a much better fit than, say, 'dragonflies' or whatnot.
And if additional Avatars are ever being considered for the message boards, I have a badger up there ONLY because there are no ferrets. :(
Anyway, I don't get told 'no' unless I ask, and you MIGHT say yes!
Cheers!
Nitpick: You should be using Pathfinderwiki instead of Golaropedia. I won't go into the details on that one, but suffice to say that Golaropedia isn't being maintained other than by the vilest necromancy. Everyone who was working on Golaropedia is now on Pathfinderwiki.
Anyway - one thing that isn't on either is the deities' favored animals. For reference for others, these can be found in the back of the Animal Archive.
Desna's favored animals are butterflies, moths, caterpillars, owls, sparrows, dragonflies, and messenger birds.
I wouldn't mind ferrets on her list, though it looks like it will be home game material only. I don't see a good enough reason for Paizo to add to this list.
Likely not, but I don't get told 'no' if I don't ask. :) I did look up the lists on my Animal Archive book. I also thought it would be happy to see if other Pathfinder players had Desna favor ferrets. It's just a silly thing.
As far as PathfinderWiki vs. Wikia, thank you for the info. I usually look over both in the event one is missing info, but I will keep your advice in mind. I usually end up searching one of the wikis, then find out what book has the info, then putting the book in my list of stuff I need to add to my library.