How can I tel if I have a rooster?

[clloyd815]

Good afternoon!! I have flock of 6 chicks and I am pretty sure one may be a rooster if not two, how exactly can I tell?!

 

[clloyd815]

Here is the one. Very mean to all the others also

 

[peopleRanimals2]

Hi! You can post pictures here and members will try to tell you. If you don't want to do this, here are some general tips. (Just know, you most likely won't know for sure until they get older. It also depends on the breeds)
Some general rule of thumbs:
Roosters feather in later, but their combs develop later and get redder later.
What breed is the one in the picture, and how old is he/she?
Have fun with your chicks!