Sounds Does anyone else's little piggy wheek doesn't make any noise?

[Presuppose]

So I noticed that my Gizmo has in fact wheeked at me just now because he dropped his little treat and thought I took it away. His mouth was moving as if he was trying to say something but no noise came out O.O

 

[pinky]

I have one that doesn't wheek. Her "wheek" sounds like a breathing sound.

 

[Presuppose]

At first I thought he was nipping at the air then it didn't look like he was having fun. So I realized it had to be a wheek.