Has anyone ever placed duck eggs in addition to chicken eggs under a broody hen in hopes that the broody hen hatches the duck eggs as well? If so, how successful were you with the switcheroo. Did the chickens take to the ducks or did they push them away? I think that it takes 28 days for duck eggs to hatch as opposed to the 21 days for chicken eggs. I tried this tonight and I'm not sure what to expect. Is this a good idea or am I asking for trouble? Any input would be helpful.