Weird Sound When Put on Music

[Sietse]

I had seen on some websites that chickens like classical music so I put on some. But for some reason they all stopped what they were doing and started growling or you could even say rolling they're r. Does anybody know what this means?

 

[Kiki]

Can you get a video of this sound?

 

[lazy gardener]

Sounds like they were alarmed by what they were hearing. Perhaps some of the tones in the music resembled hawk screech to them. Try a different composition!