Adding new ducklings to the flock

[jujubear]

I'm new to having ducks. I have 8 Muscovy ducklings that are 4 weeks old now.

I am breeding them for meat and I have the chance to get some more ducklings which are about a week older then these. The reason I want to get some more is because of possible inbreeding problems. These 8 ducklings are siblings. So I was thinking I should get a male duckling from a different flock to mate with my females.

Are there usually problems when you try to introduce new ducklings at this age?

I used to live on a pond where I saw sibling Muscovies mate with each other. I didn't get to see if they were successful in raising babies. Has anyone experienced whether siblings have mated and rasied a normal amount of babies successfully?

 

[Duck Keeper]

Usually, any amount of in-breeding is detrimental to their health, and will cause deformities or defects.

Try your hardest to get a couple more from different places, or get a mallard-derived breed. The offspring from a mallard-type X muscovy will be infertile, and unable to breed.

As for introducing them, wait until they are all about the same size, so the younger ones don't get killed.