The book on "Canine Mammary Tumour" deals exhaustively on introduction, review of literature related to the development, anatomy, lymphatic drainage of canine mammary glands; etiology, distribution, incidence, WHO classification, clinical symptoms, diagnosis, surgical excision, chemotherapy, supportive therapy, recurrence, histopathology, mitotic index, AgNOR, histological grading, immunohistochemistry, prognosis and survival about canine mammary tumours. Material and methods used for the therapeutic trial, predictive - prognostic biomarkers; parameters of the study, results of the trial, discussion and conclusion about the entire study have been covered. Suitable for students, academic faculties and research scholars who wants to have insights on canine mammary tumours.