Pru, our stray/feral, who is warming to us quite nicely has started something new the last few days. She walks around, "calling" with a plaintive cry through out the house. This goes on for a bit, then she stops. It's happening several times a day and she can get pretty loud. She's been spayed. She's eating, drinking and is okay physically. I don't know what she wants or how to help. There have been no changes in our routine, nothing new in the house. Any thoughts, does anyone else have this with their cat?