How old is this duckling? are they doing okay together? Are you giving your ducklings niacin along with their feed. Or nutritional yeast? You may want to put this duckling in his own lil space in the brooder and give it some times to recoup if an injury that way they can still see each other but the injured one won't get stepped on any more.
I'd start them on some B3 which is niacin water fowl need alot more than what chick feed can supply and if they get def they can become lame or have neurological problems or both. This maybe and injury but they still need the B3. Niacin is easy to use not always easy to find you want plain niacin not flush free or time released. That would be in dosage 150mgs per gal of water mixed and put into what ever waterer your using or getting Nutritional yeast food grade and using 1 tablespoon per cup of feed until 10 weeks old. This is very important since this is when they are growing so fast.
@DianaG59 you could probably tell by feel if his hip is out. Or gently lay your duckling on it's back in you lap and pull very gently both legs down so they are side by side do you notice any difference in either leg? Keep up the niacin make sure it's plain niacin and not flush free or time released.How is the other leg? you might want to think of may putting hobbles on your duckling for a few days and see if that helps him hold his leg normal. First though check out those legs.I have a duckling that has that same problem but the Vets in my area want payment up front or they wont see him. I started him on niacin suppliments and he is doing a bit better but this is a picture of what he looks like and how he walks. A Vet tech said it sounds like his hip may have went out and isn't a nutritional problem. The duckling is Welsh Harlequin drake and is 1 week and 3 days old.
