At what age can we start to tell the sex of our flock

[nikkichicki]

This is our first time raising chicks and now 2 ducks and I purchased 25 straight run chicks and some sexed pullets. I mixed them all up (dumb thing to do now cuz I have no way to tell which is which at this point). How old until we should be able to tell? I know I am far off from that but we plan on culling the roos I dont want to bring my pullets to an early demise in error.

Thanks,

 

[IrkanInvader89]

You should start to be able to tell by around four weeks, but most likely not until they are 5 or 6 weeks old. Sometimes it takes longer, but you should be able to get a general idea by then.