Why is my hen attacking my other hens ducklings?

[Vconde09]

I had a hen hatch some ducklings.One of the hens that is in there keeps attacking the ducklings.she was fine the first few days and all of a sudden she has became aggressive towards the ducklings. What has caused this?

 

[nchls school]

I can't say for sure, of course. But I've seen my birds go into a jealous rage when another has young. This is especially prominent with my turkeys toward other species, peahens, and broody type chickens/bantams. The behavior makes no sense other than jealousy.

 

[Miss Lydia]

Main reason I keep my mamas and babies set up inside the coop but they have their own space. Then once everyone is out for the day mama and babies get the run of the coop for the first week. Then mama is ready to bring them outside. and she will not let anyone mess with her babes but inside they are still sleeping in their own space. Maybe you can figure out a way to keep mama and ducklings safe inside the coop?