It might be a bit small. Try going for a L or XL.[COLOR=333333]Hey all! I have a Saxony duck, who I would like to take to the park. I found a Valhoma Mesh Chicken Harness - Hot Pink - Rooster online. Will this work? It is size medium and is said to fit a rooster. It is also an adjustable harness. It is around $17. Please let me know if this would be good to get her. Here is the site if you like to get a better look: https://www.walmart.com/ip/Valhoma-Corporation-625481-Mesh-Chicken-Harness-Hot-Pink-Rooster/47853860[/COLOR] [COLOR=333333][/COLOR]