I have this duckling about 4 weeks old, he was born Tiny and severely duck footed and and it’s only gotten worse, I sold him and his siblings to a family member but they were worried about him so I took him back just till he’s healthy. I figured it was a niacin deficiency so I give him supplements and I feed him mealworms, it’s been about a week with no noticeable improvement besides the fact that he stands a little more instead of just sitting down. I had to put him with a younger duck because he’s half the size he’s supposed to be. He’s also been really warm to the touch like he has a fever, he has electrolytes in his water but I don’t know what else to do with him. He’s his family’s favorite duck so I just can’t cull him but he has trouble walking and I don’t know if it’s fixable to give him a chance at life. I’m wondering if a stint would help but I don’t know how I would get it on him. Any help is greatly appreciated!