If your roosters are doing this at 6 weeks,, (they are called cockerels until one year old), I believe they have HORNS,,

I would rehome them now, if you do not need roosters for your flock.. (breeding/protecting)
Generally roosters/cockerels need to be over 6 months old to be successful dads. Things do vary by breed also.
Then we get to the discussion of a rooster being a GOOD ROOSTER. Young roosters have an overactive hormone imbalance causing them to be overactive sexually. Many hens become feather short, during times of those rooster developments. Generally, a mature rooster will be a docile, and good breeding partner with no vicious action at maybe 1 1/2 years of age.
WISHING YOU BEST,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,and
