Anemia is a condition in which the red blood cells that carry oxygen around the body are fewer than normal or do not contain enough hemoglobin. The red blood cells have a diminished ability to carry oxygen. The body requires iron to make hemoglobin, and iron deficiency may be the cause of anemia.
The most common type of anemia in dogs is called nonregenerative anemia. This type of anemia occurs when there is not enough iron available for new red blood cell formation or when the bone marrow does not produce enough new red blood cells.
Some dogs with nonregenerative anemia have no noticeable symptoms, but others may experience fatigue, weakness, pale gums and lethargy.
Other Types of Anemia in Dogs
Acquired Immune-Mediated Hemolytic Anemia – Acquired immune-mediated hemolytic anemia is caused by a reaction between antibodies in your dog’s bloodstream and his own red blood cells; this type of anemia usually requires treatment with steroids or other medications.