Yep......could get worse, or not. :fl
I always suggest having separate areas for troulbesome birds ready, just in case.
...also a plan on how to get rid of them.
Yes, but it can be more like 4+ months for any breed. Both the saddle feathers(grown out in front of tail) and hackle feathers(around neck) will be pointed and shiny on males. They are often crowing by that time.
Best bet is color of comb/wattles around 5-8 weeks, IMO.