An estimated 3 year old intact female Siberian Husky was presented to the Cornell University Hospital for Animals Community Practice Surgery Service for an elective ovariohysterectomy. The patient was from a municipal open admission animal shelter. She was brought to a second shelter where she stayed for a few days prior to surgery. The caretakers at the second shelter noticed a bleeding ulcerated mass on the left abdomen. No other historical information was available. Due to financial constraints, minimal diagnostics test could be performed prior to surgery. An incisional biopsy of the mass was obtained while the dog was under general anesthesia. Histopathology revealed a complex mammary carcinoma which was resected during a second surgery. The entire mass was submitted to the Animal Health Diagnostic Center and the final rep01t indicated a high likelihood of a poorly differentiated anaplastic carcinoma. This case study will discuss the diagnosis, pathophysiology and treatment of mammary carcinoma in dogs, in addition to reviewing the limitations of managing the patient with respect to her behavior and post-operative recovery environment.