What age is it ok to switch to all flock?

[Slaphappy]

At how many weeks can I switch to all flock?

 

[Trimurtisan]

At how many weeks can I switch to all flock?

Looks like I'll be following this thread... What is all flock?

 

[rosemarythyme]

You can use it at any age, as long as the crumble is small enough for the youngest birds.

 

[paneubert]

1 day old.