How is her weight? Hopefully you weigh her on a gram scale periodically, otherwise you don't know what her weight is doing? If the number on the gram scale is dropping, then I'd be inclined to take her to the vet. If its stable or up a little bit, I'd almost bet she's getting ready to lay an egg. Make sure she is actually able to move around the cage okay and willing to eat. Change her cage papers every day and make sure her droppings are okay. Sometimes a female getting ready to lay an egg acts like a sick bird. They will hold their droppings for long periods of time like they would if incubating an egg and when they let loose its a nasty mess. If she's down there shredding a lot of paper and protecting one certain corner, I'd guess she's feeling nesty. Your vet is the best person to talk to because none of us can see her to know for sure. If you haven't seen it before, a sick bird can look an aweful lot like one getting ready to lay an egg and vice versa. If she's sitting on the bottom of the cage fluffed up and inactive for long periods of time, get her to a vet today.
Melissa
I would just speak to her and not try to pet her while she is having a mood swing! It will save you from getting a nasty bite!
