How long should I wait after seperating breeds before collecting eggs for hatching?

[Torghn]

I had all of my chickens housed together, tonight I separated them by breed into different coops/runs. How long should I wait before collecting eggs for hatching if I don't want any hybrids?

 

[Duckopolis]

At least a week. Preferably three weeks just to make sure that there are no hybrids.