Here are five common culprits of hair loss in dogs that should be discussed with your veterinarian. Allergies are a frequent cause of hair loss in dogs. This may due to environmental triggers such as pollen, molds and dust mites, or due to parasitic triggers like fleas or mites. Food allergies are another possible cause of hair loss.
Anemia, also spelled anaemia, is usually defined as a decrease in the amount of red blood cells (RBCs) or hemoglobin in the blood. It can also be defined as a lowered ability of the blood to carry oxygen.
1 If the red blood cells size are normal in size (but low in number), this is called normocytic anemia, such as anemia that accompanies chronic disease or anemia related to kidney disease. 2  If red blood cells are larger than normal, then it is called macrocytic anemia. In general, there are three major types of anemia, classified according to the size of the red blood cells: 2  If the red blood cells are smaller than normal, this is called microcytic anemia. 3  The major causes of this type are iron deficiency (low level iron) anemia and thalassemia (inherited disorders of hemoglobin).