Cancer Effects

Pain

Tumors are usually poorly innervated and are not painful in and of themselves. The tumor often will, however, destroy the surrounding normal tissue which can cause pressure and/or pain. Pain can result from damage to bones, soft tissues, or directly to nerves. It can be difficult to assess pain in animals. A sharp pain, such as stepping on a stone, might elicit a yelp, whine, cry, or limp. Chronic, aching pain can be much more difficult to pinpoint. Often animals that are in pain simply do not keep up regular habits. They may have a decreased appetite or lose interest in playing, going for walks, or may begin to restrict their activity to certain parts of the house. If your pet exhibits these signs or if a minor limp does not resolve with a few days of rest, your pet should be examined by a veterinarian. Some pain is managed by surgical removal of the tumor, some by pain medications. You should not give your pet any over the counter or prescription pain medication without first consulting with your veterinarian. Some medications used in people are toxic to animals. Tylenol (acetaminophen) for example is fatally toxic to cats.

Warning Signs

Signs of cancer can progress slowly or rapidly. Any abnormal behavior or function in your pet that is gradually getting worse instead of better should be discussed with a veterinarian and your pet should be examined. Depending on the location of the tumor, your pet may feel fine and simply have an enlarging lump somewhere on the body, or the tumor may interfere with normal body functions. Difficulty breathing, inability to see, or difficulty eliminating (urinating and defecating) should be treated as an emergency.