Multiple answers. This vitamin is primarily involved with ra…

Multiple answers. This vitamin is primarily involved with rapidly dividing cells and aids in methionine synthesis and leucine synthesis.  A deficiency of this vitamin can cause macrothrombocytopenia, neutropenia with hypersegmentation, anemia and megaloblastic changes in the bone marrow in dogs. Breeds with a genetic disposition to metabolism abnormalities of this vitamin include Giant Schnauzers, Border Collies, Beagles and Komondors.