The Frayfeather Hippogryph 'secret' has been found by Valnaaros! See his post below. I quoted it up here also for quicker viewing:
Grats to Valnaaros on their find!Valnaaros wrote:I got it!! :DD
I decided to try and go through various emotes to try and gain a reaction. I noticed that when I did /pat that the Frayfeather Hippogryphs and Stagwings would start making a "squaking" animation. I then tried /roar, which caused them to go hostile and continue said animation
Edit: This seems to currently work for the Frayfeather Hippogryphs (Pink), but not the Stagwings (blue) at the moment.
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Edit: Rest of this is old now since it has been found, but leaving it up for history/context
So currently the only known tameable Freyfeather Hippogryph are tameable only by the Horde, due to their "friendly" disposition to the Alliance. Today Muffinus made some rather interesting tweets in regards to the question from another user asking why only Horde could tame this particular Hippogryph.
As seen here: https://twitter.com/Muffinus/status/864631795391778816There may be a way...
While this could be just fun tweets from Muffinus, there's also some other tweets/comments he made to those who responded to this inquiry that share a lot of mannerisms with his usual 'FIND THE SECRET' hunts.
Oh my, do tell! At least a hint at least!
From here: https://twitter.com/Muffinus/status/864649002066657282Do we give hints, secret-finders?
"You can" would be enough. let them mobilize and try and solve it, When they know there IS a solution. Instead of jumping at shadows in AQ
From here: https://twitter.com/Muffinus/status/864666428686819329AQ has bugs
I'm trying Archaeology right now. Then I'm going to spam corpse explosion.
From here: https://twitter.com/Muffinus/status/864672702191161344Truly, the Hippogryph is the dog of the sky.
Now of course this doesn't confirm 100% that the Frayfeather Hippogryph tameable for all is in-game, but to be fair, this is also more comments about the Hippogryph then Muffinus gave for the Lost Spectral Gryphon which they also hinted at. So my guess, it is somewhere.
What's not clear is if this is specific to the 7.2.5 PTR or Live. Currently no one can tame Feathermanes yet on Live, but it still would be possible to find the spawn of the hippogryph (much like we can find the Gryphon rare Snowblind on live, just can't tame) if it is in-game.