Also.. is something up with its bill? Will the duck have long term issues if it didn’t have proper food?
Here are a couple pictures of mine. I think the bill looks fine. The niacin requirement is very important. If they don’t get adequate amounts they will have growth deformities and could die I think. Yours looks good so far! There is a sticky thread at the top of the duck forum with all the info you need I highly recommend you read that. Good luck!!
ensure it gets enough niacin; even though feeds meant for ducks often have higher niacin than chick feeds, they often need additional on top of the feed. Follow the guidelines for pekins and you should be fine