Failure to absorb cobalamin in dogs with EPI may be due to all three potential causes of low serum cobalamin
Seek emergency medical attention immediately if you experience more severe symptoms, such as difficulty breathing, dizziness, or swelling of the face or throat, as these could be signs of a serious allergic reaction (anaphylaxis)
References Research References Mulder GD, et al
This is because B12 acts on the bone marrow to normalize red blood cell creation, and the life cycle of a red blood cell is 90 days
If you have a B12 deficiency, thats likely the cause for your anemia in the first place
[14] Biotin injections must be given by a qualified healthcare professional, such as a doctor or nurse