Duckling hatched with a bad leg need help advice?

If he has only hatched a few hours ago I'd give him a bit longer. Sometimes their feet can appear to be curled up but they kind of uncurl overnight. So, I'd wait to see how it all looks when he is fluffed up and ready to come out of the incubator.

In the meantime, get hold of some bird vitamins that you can put in his water (for when he is in the brooder). Vitamins are a good idea when foot/leg issues appear. If his foot stays curled you may need to give it some support to spread it out flat. You can cut out a bit of something stiff (like a bit of plastic) the shape of a normal duckling foot and spread out his foot on this and tape it flat. Here is a thread that shows a good picture of what to do:

http://www.backyardchickens.com/t/50180/day-old-ducklings-feet-are-curled-under

Not sure what to recommend in relation to the leg being bent back without being able to see a pic...sorry about that.

This link will give you some info.. it's is for chickens but i think you can get help here since leg problems are leg problems.. So precious by the way..https://sites.google.com/a/poultrypedia.com/poultrypedia/poultry-podiatry

Ditto 70%cocoa.  Also,  I would give the duckling swim therapy.  Warm water, 85F or so, just enough to float in because it has no oils yet, and for maybe five, ten minutes at a time, till it seems tired.

The idea is to get weight off the foot but opportunity to exercise and strengthen the muscles, perhaps let some of the tendons stretch.

Thiamine, I have heard, may help leg problems.

I also would do a mini-massage of the leg and foot, as much as might be tolerated for short periods of time (a minute or less).

I had a duckling hatch out just 3 days ago with the same problem (except with both feet) I made him/her a pair of shoes with an TV dinner box, I just cut out to the shape of the foot and spread  the foot out over the shoe and attached with band-aids. By the next morning one of the shoes had already come off but his foot looked normal so I took the other one off. He/she is now walking around normal with the other duckies. Good Luck :-)

What did you do for nutritional support?

I have a duckling with the exact same problem! The shoe idea is great but only spreads apart the web of the foot - he still holds the foot bent backwards and refuses to walk on it at all. He just hobbles around and stands on the one good leg or lays down. If you have any luck I'd love to hear what helps! I feel so sorry for the little guy, but he's eating and drinking fine.