Question on Breeding

[MayberrySaint]

I am contemplating adding an annex to my existing coop for breeding purposes. I currently have 4 breeds (Lt Brahma, Australorps, SLW and BOs) in a communal coop. I will eventually have 10-12 hens of each breed with a purebred rooster for each breed. Of course, in a communal coop, the fertilization will be all mixed. My question is this...
If I segregate one breed (hens and roo) in the annex, how long would I have to leave them in segregation before I could begin to collect eggs that would be purebred? Keep in mind that the day I put the hens in the annex, they could have been mated by a different breed rooster. In other words how long will it take for the hen to expel her "crossbred" eggs?

 

[Frozen Feathers]

I know it's longer then a week... I had my Silkies separated for a week before they started setting and I still ended up with a Phoenix/Silkie mix.

He/she is really cute though!
I'd say 3 weeks, I think that's about how long rooster sperm is potent, or at least that's what I've read on BYC. I'm new to breeding though, I'm sure someone who is more experienced will know for sure...

 

[MayberrySaint]

Quote:
UGHHH!!!!

That's not the answer I was hoping for...I wanted to use broody hens instead of an incubator. But I don't think a broody hen will last 3 weeks waiting around and then another 3 weeks of brooding. OH well...next plan...lol.

 

[Picco]

Three weeks is a safe waiting period.

 

[Motherhenandflock]

In Gail Damerow's book: A Guide to Raising Chickens, she says:
" If you switch cocks, future eggs are more likely to be fertilized by the new cock than by the old one. To be reasonably certain eggs are fertilized by the new mating, wait at least two weeks before collection them for hatching."
Hope that helps!