When to introduce young chicks to older ones

[Kristencardany]

I have five 4 week old chickens and seven 2 week old chickens.. I have them separate but was wondering at what point can I introduce them and how? Thanks!

 

[casportpony]

Hi there, sorry no one answered. How are your chicks doing?

 

[OlympicChick]

I know this is old, and I'm sorry as well that no one answered. Did it all work out?