Secret areas

[Yuhaney]

I don't think that it was that Worm, 'cause you can see and hear as it goin' through the whole place before your even come into that "Whisper-Door".
You can hear it's sound and the hole place almost collapses when it's moving inside of the mine, but still outside of that where you're moving. (You can hear the Worm even in Demo!)

And it doesn't sound like that Worm either... It sounds like those Dogs, but could it be? 'Cause that tunnel, it doesn't make sense... Do you guys think that it could be one of those Dogs?