First of all, I feel very sorry for any collector that has to go through so much grief for one attempt at the fluffy doom. It is horrid luck and I really hope it will turn for you and others so that you can one day acquire it.
Personally I've had nothing but heartache from trying to get this pet myself. I've come over to stare at the cave a number of times only to find it empty and littered with skeletons, and the one time a guildy announced that it was there, it was a whole carousel of its own.
I freaked out, of course and frantically asked for an invite. Upon receiving one I immediately spammed my friend list for more people to join us and even hooked up people from trade when the number was too low. So all gathered, we prepped up and quickly engaged it.
Now, during all this, my guildy who, sensing my froth and frantic behavior over this fluffy doom, gave me leader. I then proceeded to ask the raid to please remember me, whomever might win it. I was offering them payment for it, as much as I could give them which at the time was only 10 k. I'm a casual player, I don't mess with the AH as much as I perhaps should, so my wallet isn't too impressive. But in any case, pleaded. It was won by another player ofc and I whisper her, asking if she'd be willing to part with it.
As you can probably guess it, she didn't want to trade it. She even said she was a collector, so I gave up. As it turns out later after an armory check, she barely had above 100 pets. At which I couldn't help but feel worse. I love collectors. But to say you are an avid collector and it turns out you've just started, well it's a little bitter I guess. I've only just started digging myself into MoP myself with well over the 170 mark before the expansion hit, so I have a lot of wild pets to collect still. But oh well.
Just have to keep our heads high and try again and again. One day we'll get it. This fluffy doom.
Not a particularly happy post and I apologize, but I guess I just needed to vent a little myself. x_o
Take care all. <3