Provide Separate Housing (Recommended)

Solution

House ducks and chickens in separate coops, even if they share the same daytime run.

Explanation

Chickens need dry conditions and roosts; ducks need ground-level access and are wet/messy. Keeping coops separate caters best to each species' needs, especially regarding nighttime shelter and bedding management.

Notes

This is the generally recommended approach for minimizing problems.