Animals are every bit as sensitive to the electromagnetic frequencies bombarding the current world environment as are humans, so they will suffer along with the humans—that is the greatest reason at present for the increased frequency of cancers. They will always be sharing the burden for healing of humans because they are sent to be healers of humanity and a significant number will take on the problems of their human companions personally to the point of suffering a similar malady, or take the energy of negativity to heart as a way to shelter their human charge and it may well cause a problem in their physical body of this kind. So the emotional discord, suffering, and karmic burdens of a beloved human can easily overwhelm a companion animal because human suffering has been so very great through the ages. The human technologies are adding insult to injury and further complicating things for these wonderful beings. In a sense, they are an indicator for hazards in the environment and that is the meaning and correct interpretation of what you are seeing with the growing frequency of cancers in dogs and cats.