Cayuga ready to lay eggs?

[AzDuck]

3 of my 4 females (2 runners and 1 khaki) are laying, and have been since the beginning of October. They are now a little over 6 months. My Cayuga isn’t laying yet, but she has an awkward little “pouch” that almost drags the ground sometimes. I heard that means they are getting close to laying, but she has had it awhile. Should I be worried? She’s eating, running, playing, drinking and pooping normally though. It has gotten bigger from the time this picture was taken during the summer.

 

[Duck mommy 2019]

both my laying girls have that, i think it just happens