Dogs eating vitamin b12 can help dogs supplement trace elements, promote absorption, maintain healthy development, and can also get rid of dogs’ bad habits of eating randomly. Some dogs lack trace elements and will eat wall coverings, feces, etc., which will develop bad habits over time and cause trouble to their owners. Therefore, it is very good to give your dog a little vitamin b12 occasionally. You can also choose Liver and meat to help dogs supplement vitamin b12.