What is wrong with my pekin?!?! Can someone help please?

[Saltysunshine79]

So I have 2, female 3 week old Pekin ducks I had shipped from a very well known hatchery. They both had been developing perfectly normal and even, however the past week I've noticed one only wants to lay down constantly.She'll take two steps and then lay right back down. Her sister always seems ravenous and starving and she eats but doesn't rush to the bowl like her sister. They eat kale, brocolli, carrots and cabbage and of coarse their duck food. They are spoiled rotten, swim 2 -3 times a day in their pool. But today and yesterday she just seems to lay there, even closing her eyes like she is exhausted. I also noticed that she isnt developing as fast as her sister. Everything on her is smaller, from her feet, to her wings to her feathers coming in. Is it possible she would be a failure to thrive this far down the road when they damn near look grown? I'm so worried about her and we dont want to lose her. And to boot, no vet around here sees ducks!!!! We are in eastern Carolina...what the hecks up with that?!? If anyone has an idea or has seen this before. I Thought maybe she could be exhausted from growing so fast but then wouldn't her sister be behaving the same way?

 

[Pyxis]

Not wanting to walk very much could possibly point to a niacin deficiency causing leg issues. What feed are you feeding them, and have you been supplementing with niacin? Are you making sure the treats are only a small part of their diet so that they're getting all the nutrient they need from their feed? Are you giving them free choice access to their feed so that they can eat whenever they need to?

 

[Duck mommy 2019]

sounds like niacin deficiency

 

[Isaac 0]

Stunted growth and reluctance to walk are both signs of a niacin deficiency, you also have a breed which is known for being niacin deficient due to their fast growth, to add to this, they’re around the age where your signs of niacin deficiency are common.

A video of them walking would be great.

For more info regarding niacin deficiency in ducks read this,

https://www.backyardchickens.com/threads/niacin-deficiency-in-waterfowl.1367557/