What to do about this screaming sebright?

[coopdetat]

My sebright does this for hours on end:

She's only been doing this for 2 or 3 months, and it doesn't seem to have anything to do with her egg laying. What could it be? It's only a matter of time before the neighbors start to complain.

 

[kara_leigh]

I have one (Polish Crest) that sounds just like that, and does that all the time. I have no clue what is going on, so I hope someone has some answers for you! I just keep telling her that she doesn't live at the zoo, so she can quit making our yard sound like one. LOL

 

[Zonoma]

My Sebright did that until I got her another one. Even in a flock of 10 big girls! They seem to be lonely for their own kind.