Looking for advice

[chipens]

Hello, i have a few muscovy ducks 4 girls one drake. Every time they come to nest and sit on eggs 2 of them always decide to sit on the same nest. (We got them together) and hatch out/ mother together which is fine, but they attack the other 2 ducks ducklings! The other 2 ducks know whose ducklings whose but dont attack the other ducks ducklings like these 2 do.
Is this normal behaviour?
Im thinking of getting rid of the 2 trouble makers

 

[oldhenlikesdogs]

Generally most muscovy hens will chase other hens ducklings up to a point. The fact that you have 2 that get along so well I think is an asset. I occasionally have had hens set close to each other, but never co-parent, though I've seen it in chickens.