Adding new ducklings

[aklabo]

I have 1 Welsh, 1 runner and 1 Golden 300 that are about 4-5 months old. I just brought home 2 more runners, 1 buff and 1 khaki that are a week old tomorrow. All are females. Is there a procedure I should follow when adding the new ducklings to the older ones? How old should they be?
Thanks!

 

[Aaronblackman]

With most animals; the younger they are when introduced the better and if they are both females you should be fine to put them in now

 

[aklabo]

That would be great because the flies are flocking into the house unless I change their bedding every day. It's only 75-80 degrees here and rainy this week. Is that too cold for new 1 week olds?
Thanks for the reply!