Blood Loss in Cats – Internal and External

Blood loss in cats

Blood loss is a potentially life-threatening condition characterised by the loss of circulating blood either externally or internally. Blood has many functions including delivering nutrients and oxygen to the cells and transporting nitrogen from the cells to the lungs and out of the body.

Blood loss can occur for a number of reasons, it may be external, which you will be able to see or internal, which is not always visible.

External causes of blood loss:

  • Cuts and wounds (such as bites), fractures, bleeding after delivering kittens, cat fleas, injuries sustained from a fall or a car accident, nosebleeds, gunshot wounds etc.

Internal causes of blood loss:

  • Trauma, poisoning (rat), blood clotting disorders, intestinal parasites such as hookworm.

What are the signs of blood loss?

Obviously, if the injury is external, you will see blood, however, internal injuries can be harder to pick.

Common symptoms of blood loss include:

  • Bleeding from the mouth, nose, gums, anus. This can be due to an injury to the affected area, or where bleeding occurs without any apparent damage and/or occurs from several parts of the body (such as the mouth, anus, gums etc), then a blood clotting disorder is likely.
  • Small red dots (petechia) under the skin and mucous membranes.
  • Blood in the feces or vomit. This may be bright red (hematochezia), which indicates bleeding is occurring in the lower intestine (colon or rectum), or dark, tarry stools (melena), which is bleeding from the stomach or intestine. While both causes of blood in the stool should be investigated, melena is far more serious.
  • Abdominal pain.
  • Vomiting blood (hematemesis) can indicate internal bleeding.
  • Symptoms associated with anemia including lethargy, weakness, pale gums, rapid breathing, loss of appetite.
  • Symptoms associated with shock including difficulty standing, confusion, panting, hypothermia (low body temperature), weak and rapid pulse, rapid but shallow breathing.

Any visible wounds or trauma should be seen by a veterinarian immediately. If your cat has been involved in an accident, even if he appears to be well, you should also seek veterinary assistance as internal bleeding is a common result of trauma.

How is blood loss treated?

If possible, try to stem the flow of blood by applying a clean gauze or sanitary pad to the affected area. Hands should be thoroughly washed before handling a cat with an injury. Take your cat to the veterinarian immediately.

Any external wounds or fractures will be treated by cleaning and dressing the wound. Fractures will need to be repaired surgically.

Surgery to treat wounds may be necessary.

The cause of internal bleeding needs to be determined and treated accordingly. This may require ultrasound and/or x-rays to look at your cat internally to determine the cause and the location of the bleeding.

Vitamin K is given to cats who have ingested rat poison.

Supportive care may be necessary for the very sick cat, including oxygen and fluid therapy.

Anti-parasite medication to treat worms.

Severe cases of blood loss may require a blood transfusion. This requires your cat’s blood group to be determined (there are three blood groups, A, B and AB), and the blood is taken from a suitable donor cat to be given via intravenous injection to your cat.

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