Can I Mix 2 mother ducks

[burnski10]

I recently had two liters of ducklings hatch a little over a week ago. Now I have one mother and her two ducklings in a separate pen but the other hatched hers under my shed. She started off with 10 and now see has 7 so in order to protect the others I was thinking of putting her with the other mother but I don't know if they will kill each others ducklings. What should I do?

 

[burnski10]

 

[LaurelC]

The woman I bought my scovy ducklings from had 2 moms with clutches that hatched 2 weeks apart. They were fine together, however I think it depends on how well the mamas get along also.