The RBC (red blood cell) count and/or the hemoglobin level for the dog is less than normal. The low levels result in insufficient available oxygen to organs and tissues causing lethargy, weakness, and lack of appetite. The gums and tongue become pale pink to white. In dogs with severe anemia, the pulse and respiratory rate are rapid, and the dog may collapse with exertion. A heart murmur may also be heard. The dog anemia may be of several kinds and produced by a variety of underlying causes
