how to give b12 injection to kitten injections in kitten! : r/CatAdvice How to Give a Subcutaneous
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Clean the area with alcohol

Once the sharps bin is full, research your local rules on how to dispose

The effects of a B12 shot can last anywhere from one week to several months, depending on individual needs, metabolic rate, and underlying deficiency severity
however, being proactive with taking B12 throughout your life may help prevent the onset of cognitive decline
