A deficiency in either B12 or folate causes macrocytic anemia. (rawsomehealthy.com)
NOTE: Macrocytic lactones including ivermectin are given as a part of the treatment of heartworm disease but only in conjunction with more specific heartworm therapy. (pethealthnetwork.com)
When your body is deficient in vitamin B12, the volume of red blood cells increases and causes macrocytic anemia. (integrativehealthcare.com)