Tick borne diseases and their complications in dogs are increasing over the years. Periodical assessments helps in planning to handle such health care burdens. Medical records of the clinical cases presented to the Small Animal Medicine Referral Clinics and Emergency Critical Care Medicine Referral Clinic of Madras Veterinary College, Chennai, were analyzed. Among the TBD cases of 268 identified in this study, 120 cases were ehrlichiosis affected dogs (44.77%) and remained one among the highly prevalent disease in Chennai Metropolitan Area. 66 cases (24.62%) were found to be affected by Babesia canis and 59 cases (22.01%) were found to be affected by Babesia gibsoni. Together babesiois affected dogs were 46.63%, which is little higher than the E.canis affections. 23 dogs (8.58%) were found to be affected with H.canis. Incidence of TBD, status of anemia, thrombocytopenia and pancytopenia due to E.canis were evaluated in this study.