vitamin b12 injections for cats It may take several weks of treatment to notice improvement of condition Giving Your Cat a Vitamin
Description
However, if there are neurological symptoms that have arisen due to B12 deficiency, they could take up to three months to improve, with mild improvements occurring in the first six weeks

I wound up needing 1 1/2 inch needles, the only downside is they dont give you sizing options when buying their products

Salmon, 2

Stier, Heike, Evert Vos, and David Kenley
