Depends on the roosters and on how many hens are in the flock. If the ratio is right, and the boys learn to get along or are raised together, there can be peace. I have four in my flock with 37 hens, but am seriously considering culling one troublemaker. The two eldest get along fine, the third...
Nope. He's beating up on the chicks and that's not a good sign at all. Establishing his place in the pecking order with a few pecks and some brief foot races is fine and normal, but attacking and beating them up is a no-no. No good rooster hurts the kiddos; he's supposed to protect them...