Best strategy for gathering eggs?

[remuda]

I have multiple roos and hens. I want eggs from a specific pair. Obviously I need to separate the two, but how long until I can be sure of the eggs coming from this pair?

 

[RyderTheChicken]

Maybe about 30 minutes at the most it happens pretty quickly

 

[BlueBaby]

I read before that you should wait 3 to 4 week's to make sure that any all other roosters sperm is no longer in the hen.