Lol Ik, I go in creative mode all the time and fly everywhere looking for one -.- but so far, I've failed.
Even though, we don't know if someone could have dyed it, not you but someone might have gone and dyed a few sheep to fool a few people.
Very true, this is quite possible on a multiplayer server. I would still believe it was real, beauty is in the eye of the beholder after all Only ones found in single player or on newly generated chunks in multiplayer can be certain they are legit