Yes, I have been working on my cats for the past two months. One has a serious heart problem and the other had a breathing problem and lethargy. They both responded to a simple healing immediately. Animals seem to be very open to this stuff. I definitely think it will help your duck. I have really only been following simple healing protocols that are in the heal others section of the course. And I had no previous experience prior to this. I had to go over the video and the course materials a few times before I felt confident enough to try it. But it really is so easy, it only seems a little confusing at first. I'm not sure what the exact protocol is for the foot or leg as I don't see it listed in the course, but maybe someone else here can tell you. I would do a distance healing for you but I don't have any experience with that yet. I think your duck would benefit more from you doing it yourself. You'll see, they will most likely feel better right away. And if you have any questions about anything you're doing, just post them here. Good luck to you and your duck.