This is nothing new to me, however the frequency in which she was sharing with us (all day) yesterday had me confoggled. I cleaned their cages yesterday and put them back in and within a half hour she was chirping. She would stop for awhile and then start up again. When she did start, it would last for 20 minutes. The only thing different I did this time, was to add some towels on top of the bedding (where they normally don't potty) so they had somewhere warm and comfy to lay down.
Yes this started in broad daylight so I was able to observe her, the same trance like appearance, the rest of the herd still and listening, and when she was done she would just sit there. I don't bother her (or the other two I have that chirp) while she is doing this, I like watching to see if there are any triggers; her behaviors and the others afterwards.