Background: A 2.5-month-old puppy was presented to the Veterinary Clinical Complex of the College of Veterinary Sciences and AH, Jalukie, Nagaland with a complaint of emesis for one week, inappetence, icterus of the lower abdominal area and other visible mucous membrane. Detailed clinical history was collected and clinical examination was conducted.&nbsp; 
 
Methods: 4 ml blood peripheral blood was collected from the cephalic vein in the Lev-Lock blood clot activator vacutainer to harvest serum for biochemical analysis. Another 2 ml of whole blood was also collected in Lev-Lock K3 EDTA vacutainer for complete blood count, blood smear examination for blood parasites, morphological changes in the RBC and IDEXX SNAP 4Dx Plus test kit was also used for diagnosis of the blood parasites test. 
 
Result: Peripheral blood smear examination and IDEXX SNAP 4Dx Plus test were found to be negative for blood parasites, but spherocytosis could be observed in the blood smears. A complete blood count (CBC) examination revealed severe anaemia of macrocytic normochromic type, neutrophilic leucocytosis and thrombocytopenia. Serum biochemistry revealed a decrease in blood urea nitrogen (BUN) and creatinine with normal alanine transaminase (ALT). Treatment with whole blood transfusion, corticosteroid and other supportive therapy was successful in this case. Based on the clinical presentation, laboratory findings and its response to the treatment with prednisolone, it was diagnosed as an idiopathic immune-mediated haemolytic anaemia (IMHA) with an extravascular mechanism of haemolysis. A follow-up review after 1 year and 4 months post-treatment reported that the dog was still alive and healthy.&nbsp;

Idiopathic Immune Mediated Haemolytic Anaemia (IMHA) in a 2.5-Month-old Puppy: A Case Report