Cancer is ruthless. In humans it takes our dignity before our lives. In dogs, it leaves us humans only with shock and surprise. The warning signs are so slight even the professionals are puzzled. We usually can't tell anything is wrong with our dogs until it is too late to help them even if we knew how.
Dogs are naturally reluctant to show weakness of any kind.
It's a pack thing that us humans do not understand. I do know that united and loving souls can't be kept apart. Our limited understanding of the workings of spirit and life force are dissolved in the devastation of our apparent loss. Cancer may take carbon forms, but cancer also unites spirits into a locked and loving force that races through and transcends time and space to reveal lofted amazement at the mystery of life itself.