chirping weasels

There's a story I've been trying to track down... I'm not sure if it's true or not. It goes like this:

Hens seem to be  biologically programmed to run toward and nurture things that peep or chirp like a baby chick.
The same hens seem to have a programmed flight response to seeing a weasel. They run the second they see one.
So, take a stuffed weasel, and put inside it a little electronic chirp making speaker.
Then set this chirping weasel inside a room full of hens.
It causes the alleged  programming to glitch, and the chicken will freeze, unable to move, unable to think, until you take the thing away.

Anybody know if this is true?  A link of some sort would flat out rock.

I've always wanted to name something "chirping weasels" because of this story.