My white female peeking duck is about 2 1/2 years old and has been limping since about last July. Shortly after that she stopped laying eggs though she layed an egg almost every day before that. I thought she sprained her leg somehow by climbing into her baby pool. I did put a step in front of it for her. I have done everything I can think of to help it heal, but with no luck, like keeping her on soft grass in a pen without the baby pool. Then I took her to a vet that accepts ducks (has farm animals himself). He thought she might have some arthritis and gave her a shot. I waited a week and the shot didn't help. I took her back and he gave her a shot of a different medication, not saying what it was. He said that if this doesn't work, it's probably arthritis. Well, I love Stella, my duck, and am really bothered by this. She actually puts her wings out for balance to walk and acts like it is very painful. Then I researched and noticed that she is pigeon toed and that spinach can cause this, depleting the niacin in her food. I stopped giving her spinach. Stella gets Flock Raiser by Purina for all ages of fowl including ducks. I have been crushing 1/2 a niacin tablet in her water every day for about 2 weeks. Stella gets around ok and gets in her water but I haven't seen her feet change angle yet and she still limps. Can anyone help me? I don't care about having no eggs, just Stella's quality of life. My chickens try to peck her eyes so I keep her separate from them but close by because she likes them.