Ours get on fine EXCEPT now that the mums are sat on their eggs. When they get off their nest they march about feathers up and head down hissing and will attack females that are not sitting on eggs. You can spot the mums who have left their eggs by the way they strut about then have a good bath and clean before eating and getting back on the egss - others have learnt to keep out of their way or else. #Ducklings due from tomorrow onwards ( 60 plus !!)