B12 injections are great for anyone with compromised absorption like with coeliac, IBD or general digestive issues
Thats why supplementation with B12 leads to more efficient oxygen transport and higher energy levels
D51.8 Other Vitamin B12 Deficiency Anemias Use for B12 deficiency from causes not classified elsewhere, such as post-gastrectomy, ileal resection, Crohn disease-related malabsorption, bacterial overgrowth, or long-term medication effects (metformin, proton pump inhibitors, H2 blockers)
Vitamin B12 has a good safety profile, but some important considerations include rare hypersensitivity reactions (including anaphylaxis) with injections, potential hypokalaemia during early treatment of severe deficiency, and possible cutaneous reactions
High calories nutritional paste contains mineral and supplements including B12 that are suitable for finicky cats with mild anemia.
Their appetite suppression does not kick in as reliably, or they feel like they are not getting the same effect from the same dose