so i’ve got a baby duck and I’ve bought another for company to the first. The smaller is 2 weeks old, the other 3 weeks old. They’re normal domestic ducks. So the smaller one stopped using it’s legs 2 days ago. The vet said we can do nothing, everything’s fine, buy them vitamins. Okay I bought vitamins today. But it’s leg started curling up, I guess, it’s shaking, because of pain(?). It’s trying to follow the other duckling, and eats well. What can I do? What should I do?