I'd try to exchange it for the right stuff if possible. How much protein in the chick starter? 22% is the preferred minimum, below 20% is not recommended.
A reputable link to nutritional requirements for ducks and geese..
https://www.metzerfarms.com/nutritional-requirements.html
I usually use Purina Flock raiser.. I contacted the company since niacin content isn't required by law to be listed on the bag nor is it.. the amount was 55mg/kg.. so appropriate for most (excluding jumbo Pekin). But you can always contact the company to get a copy of the full analysis if there is any item your in question about.