Has anyone else used this Purina Premium Duck Feed Pellets on their days-old ducklings? I’m just curious if it’s “good enough” or if I should get something else? It says it has 27.27mg/lb of Niacin and is 19% protein. (We smash it up into crumbles so they can eat it right now.) Does this seem like good food for ducklings or should I add extra niacin?