Yesterday, I read that ducks are better than chickens.
Chickens scratch - and take your garden seeds as they do.
Ducks drill for slugs and bugs without being so invasive.
Ducks vs Chickens: Pros and Cons for Raising Each Species

If you live in a climate that is better-suited to ducks, such as the northwestern portions of the United States, you are actually going to find that ducks are better adapted to the climate.
As a result, the best-laying duck breeds outperform the best-laying chicken breeds each and every time. Why? Ducks have the unique ability to free-range on foods that chickens can’t.

They will eat a variety of foods like slugs and snails and also perform better in rainy, wet conditions. As a result, their laying ability will remain consistent in these climates while you may find that a chicken’s tapers off.

In addition, people who are allergic to chicken eggs can often eat duck eggs.

While there are some people who are allergic to both, this is quite rare, and you won’t usually find a person who is allergic to duck eggs but not to chicken eggs.