If that is DuMor brand, no, it isn't sufficient alone for ducklings... you would have to add brewers yeast or Niacin to supplement... ask for Purina Flock Raiser crumbles, TSC's usually carry it... that is sufficient by itself, but getting some brewers yeast or PLAIN Niacin tablets from grocery store just in case is a good idea... a medium sized sour cream or cottage cheese tub with a notch cut out on one side of the lid just bigger than his head works fine for water for now...
Not sure on breed, I think could be Muscovy, but need to see front view of face to tell better... Muscovies have a face mask that as ducklings makes a thick line around the base of their bill all around...
He looks to be about a week old, pin feathers look like they are starting in his tail...
He is hiding his head because he is terrified... this is normal in a wild, broody raised duckling of that age... slow movements, talk softly, and try to always bring your hand down in front of him and come up from below when picking him up... hands coming directly down towards him will trigger flight from predator response...