putting day old with 3 weeks

[kalbert12]

Can I put a younger chicks in with older chicks ?

 

[Judy]

There is a rule of thumb that this is OK if they are all under 4 weeks -- but like any rule of thumb, it may not match your situation. If you try it, I'd supervise, and provide as much space as possible. A new space, or just lots of space for all, would be excellent.