I think they’ll be old enough when they start behaving like roosters. Not sure what that age is, but that’s when they’ll have to go. We can’t have roosters here either.
I’m new to this but I can tell you what we will be doing. We have 6 chicks that we’re supposed to be pullets. 1 is definitely a rooster (very obvious at 6 weeks for this one) and 2 others now I’m starting to question.
We’ll be waiting for them to fully confirm their roosterness...