Limping duckling, please help!

[macyduck]

I bought 3 ducklings last week, two of which are more than twice their original size now and one that hasn't gotten any bigger. They were all healthy seeming up until yesterday when we took them outside to play, our little runt wasn't walking with the others and when he tried he limped. He keeps his leg curled up and doesn't move much. I put him in the bath and he swims perfectly! His size also concerns me so I take him out and hand feed and water him daily to make sure he's getting plenty to eat. He has chick started (non-medicated) and grit. He also doesn't stretch his neck like the others.
I'm not sure about their age but I'm assuming they were 3-4 days old when I bought them and believe they are Pekins

I hope it's just a vitamins deficiency or something that is easily fixed
I'll post more pics in thread, I'm not sure how to add more than one at a time

 

[macyduck]

 

[Wyorp Rock]

Cute ducklings!

I'm not sure what's going on there, let's see if we can find someone knowledgeable with ducks that can help you.

@Amiga
@RavynFallen
Any ideas?

 

[Amiga]

Duckling could have internal problems, but I would start on vitamin supplements. If it were me I would get B Complex vitamins, and add to drinking water. Use the amount of B3-niacin as the guide, 150 mg B3 per gallon of drinking water.

I would also give probiotics once or twice a week for a couple of weeks.

 

[Amiga]

@macyduck please keep us updated.

 

[macyduck]

Duckling could have internal problems, but I would start on vitamin supplements. If it were me I would get B Complex vitamins, and add to drinking water. Use the amount of B3-niacin as the guide, 150 mg B3 per gallon of drinking water.

I would also give probiotics once or twice a week for a couple of weeks.

Today I gave him probiotic and electrolytes, I couldn't find any brewers yeast but I ordered some through prime. Is the b complex vitamins for ducks or where would I find that?

 

[macyduck]

@macyduck
please keep us updated.

We're at the vets clinic now!

 

[macyduck]

UPDATE: we took baby duck to the vet. Nothing is wrong with his legs or neck!
The vet said it's from an incubation problem with humidity
His yolk isn't dissolving so it can be surgically removed, but isn't worth the risk. Also his belly button is infected so he's on antibiotics now
There's a chance he may not make it, but it's more likely he does. Only time will tell if he'll be a normal or special duck as an adult