Possible Signs of Cancer

Changes in a pet’s behavior or appearance can indicate it may have cancer. Although these signs don’t always mean cancer, noticing them and consulting a veterinarian early can improve treatment outcomes. Signs to watch for include:

  • A growing or changing lump

  • Swollen lymph nodes

  • Sudden abdominal swelling

  • Unexplained bleeding (from the anus, reproductive tract, mouth, nose, or other organs)

  • Difficulty breathing, chewing, or swallowing

  • Persistent sores or swellings

  • Bad breath or unusual odors

  • Dry cough

  • Recurrent vomiting or diarrhea

  • Weight loss or decreased appetite

  • Lack of interest in activities

  • Signs of pain, like limping or stiffness