Most people dont have problems with B12 shots, but some might feel pain or redness at the site, have diarrhea, or itch
B12 is an essential vitamin for all cats, playing a crucial role in their digestive system, immune system, and nervous system
When to seek medical help See a doctor promptly if you have spreading redness or warmth around the site, discharge or a fever, numbness or weakness that does not settle, or any swelling of the face, lips or throat or difficulty breathing, which can signal a rare allergic reaction and is a medical emergency
Treatment frequency depends on the nutrient status of your flock
Conversely, a vitamin B12 deficiency may contribute to nerve damage, resulting in confusion, memory loss, and other physical impairments