On the same clean in your home and not talk account, your guests knocks down the smell is already in the hallway. Cancers often appear closer to old age, when a prompt treatment, and this is not (the probability of death during anesthesia is high). In these cases, doctors recommend to wait until the last reasonable, in other words, let the situation slide. In this case, the owner has to take into account the fact that the animal is experiencing a constant and sometimes debilitating pain! Tumor eats the inside and prevents the normal functioning of organs and systems, and the pain, constant pain! Life is "blind". Reduced vision, for example, in dogs is not such a big loss, it is not their primary ability to perceive the surrounding world. But when the animal goes blind and deaf, loses the scent, comes the loss of coordination (often due to ischemic (an animal walking around, bumps into walls, furniture)), or has seizures into one another, the solution suggests itself. This is not the same one that you knew before, this is a deeply sick animal.
It is itself a difficult to remember, not to mention you! 4. Not compatible with life. The essence of the problem lies in the host itself, which essentially pulls the animal's life to end, at any price. State in which even the vets lose heart (people experienced, knowledgeable), they do not wish you anything bad, listen to their advice. Some diseases run up to such an extent that the owner sees the urgency of the situation.