Sometimes Cherry will be looking out the window or something and just start making this terribly sad sound like "Coooooo" or mewing / crying noise in a few second intervals. It'll go on for a minute or two and then she's back to normal. I wish I could record a video of it but I don't have anything that can.

Anyway does anyone know what this noise means? Is she just alarmed at something she saw outside? Or sad / in pain? Perhaps bored or lonely?

Thanks in advance!