I was reading that my duckling may have a shaky leg because of a nicain deficiency l. I give them those packets from the feed stores that are of electrolytes. Is that nicain? They are on basic non medicated starter feed and almost 3 weeks old. They have access to water and food 24/7 and I clean the brooder twice a day. This is my first time raising ducks and I already lost one.. I'd hate to lose another.