Getting 30 chicks unsexed
It depends on the breed as far as when you can harvest the males. I have a lot of different breeds but most of the males can be harvested by
3 1/2 to 4 months old for fryers. 6 to 7 months old makes a meatier chicken usually.
I keep all my young ones together until the males are ready to harvest. But too many males can be hard on the females when they all start to mature at around 5 months old so I try to reduce the rooster population before the hens start to lay eggs.