Originally Posted by iridehorses
I find that one hard to believe. The noise is physiologically not psychologically induced.
I agree with you... it's just air. I think some people feel the need to create an ingenious solution to a non existant problem
Edited to add: I've had relaxed geldings, non-stall kept, make that noise. Movement creates a vaccuum so to speak and draws in and expels air.. period. Has nothing to do with stress