I would try something Sylvia Brown said to do. Tell her she has passed and it is time to go "home" and into the light.. Why should animals be any different than people when it comes to that and some people do not realize they have died or maybe it is your love for her that is keeping her here. I would start talking like she was right there and I could see her and talk, telling her I love her and will always miss her but that someday, you will be reunited and be together forever. She will forever be in your heart and that is HER place in your heart, that nothing could ever replace but it is time for her to move on and you love her enough to let her go.

It sure can't hurt anything to give it a try.