Tell you friend that she should in no way feel guilty. What her dog knew, more than anything, was that she always loved him, and cared for him. I'd bet he knew when she was sad, and would comfort her. He knew he was sick, and suffering. He knew that his suffering was difficult for her, whom he loved so very much. For himself, he would put up with pain if he had to, but he did not want make her so sad. He is free now, free of the pain and sadness, and will wait for her, joyful and running free, at the Rainbow Bridge. We know she is sad for her loss, but he will always, always be with her, in her heart, curled up in a warm corner, for whenever she thinks of him. Cry for a moment for her loss, but then smile forever at the joy he brought to her life - joy for always.