A few years ago, when I was in Georgia and My neighbor, Mr. Harris was still around.... He had a little grey female kitten he called Lucky. I had a little black chow named Baboo. Baboo and Lucky were the best of friends, and spent all of their time playing together. One day Baboo decided to wander off-(he loved the kids in the houses behind us)- and never came back. I searched everywhere for months and never found him. One of the hardest things was trying to comfort Lucky. she would come in the house and search every room calling for Baboo, and she did this over and over for several days. She was never the same after that. This is something I have learned about Cats over the years... Once they lose their best friend, they will never have another. they will have friends and family, but they won't play with them or other cat things... I know that dogs feel loss deeply, all I can tell you is to sit with her. just sit and talk to her. Sometimes they can't get passed the grief. I have a very large baby now, Named Mobey. He is a chow/lab mix. He loves cats... can't get enough of them, and he has adopted three strays from the neighborhood. They absolutely adore and worship him as their hero because he protects them from evil dogs and mean cats. He worries if he can't find them before bedtime. Maybe if your girl starts to feel better, you might think about getting her a kitten to take care of. A new baby seems to bring out the joy in their hearts. I am sorry for your great loss.