Lymphoma is one of the most common cancers in dogs, and chemotherapy decisions involve complex welfare trade-offs between treatment benefits and side effects.
Dogs receiving chemotherapy for lymphoma can enjoy good quality of life during treatment. Without treatment, lymphoma progresses rapidly causing significant suffering. Veterinary oncologists recommend focusing on quality of life over quantity, stopping treatment if side effects become unacceptable. Palliative care alone is a valid choice for some owners and dogs.