Cancer is one of the leading causes of death in companion animals, and access to palliative care and pain management significantly affects quality of life in affected animals.
Companion animal cancer creates complex welfare decisions for owners and veterinarians. Aggressive treatment may extend life but impose significant suffering from treatment side effects. Palliative care that prioritises comfort and quality of life over length of survival may result in a shorter but more positive remaining life. Both approaches can be welfare-positive depending on circumstances; neither is categorically wrong. What matters is that the decision is made with honest information about prognosis, treatment side effects, and quality of life expectations — not primarily on the basis of owner emotional difficulty with accepting a terminal diagnosis. Veterinarians who provide honest prognostic information and support for palliative care decisions serve their patients welfare most effectively.