Symptoms of Canine Mammary Tumors

The main symptoms of canine mammary tumors include:

Visible protruding tumors in the mammary area with clear boundaries, varying in shape, size, color, and texture.
Feeling a hard, palpable lump in the mammary area, local increase in skin temperature, and possible secretions from the nipples of the affected breast.
Concurrent symptoms such as depression, loss of appetite, severe weight loss, and pain upon touching the lump.

It is usually necessary to consult a veterinarian for diagnosis, which typically involves B-ultrasound or X-ray examinations.

In the early stages of mammary tumors, dogs usually show no signs of abnormal eating or mental condition. There may be visible fixed tissue resembling growths near the breast, with no clinical symptoms or redness, swelling, or pain.
Over time, the fixed tissue will grow and spread, absorbing the dog's nutrients. A noticeable hard lump can be felt in the dog's abdomen. It is important to check for metastases in the dog's axillary and inguinal lymph nodes.
When the tumor reaches the limit of skin stretching, it may rupture and emit a foul smell. It is recommended to take the dog to a pet hospital for tumor testing to determine if the tumor is malignant or benign, and to seek timely treatment.