The document discusses the surgical management of mammary tumors in dogs. It provides background on mammary tumors, including that they are the most common tumors in female dogs, often malignant, and can metastasize to lymph nodes and lungs. It then describes the case of a 10-year old female Labrador that presented with a large, ulcerated mammary tumor. The dog underwent surgical excision of the tumor along with pre-operative medication, anesthesia, and post-operative antibiotic and analgesic treatment.