I adopted a beautiful 1-2 year old Calico female from the shelter. She was pregnant when they spayed her. About two weeks after she came to live me, she developed a false pregnancy, her nipples became full and pinked out. Her tummy developed a pooch. She nested everywhere and carried my dog's plush toys to her nests. The dog was very patient and waited to steal back after she left the nest. The false pregnancy is over, her pooch is disappearing and her nipples are returning to before pregnancy status. But what hasn't stopped is the yowling. She yowls at night so much, it was driving us insane and during the day she goes all over the house yowling. We can't figure it out. I have read possible part of ovary left could do this, but does anybody have any other ideas? Thanks for help. JC