When can I keep my 4 week old lonely duckling with younger ducklings?

[kaitling]

My 4 week old duckling lost her buddy a few days ago. I went to my local feed store to get her some friends, they are much younger. When can I keep them together? She has nipped at them a few times, but has started to relax around them.

Thanks!

 

[kaitling]

Here is a pic of them

 

[dotknott]

I keep my ducklings that are 3 weeks apart together, though mine are a little older than yours.

As long as you can meet the requirements of both ages and they get along well then you should be okay.