Mature rooster always better than immature although not all breeds are equal owing to mental or physical limitations. The fluffy breeds like silkies and smaller breeds will be physically limited. I have American Games which are probably the best and even they benefit from having cover to operate from. As your roosters mature, watch for changes in behavior relative to hens and pitch of voice as that will indicate when rooster will be effective. Also, roosters effectiveness against hawks is a function of molt where my birds are off hawk fighting duty until molt complete.I just thought between 6 roosters there may be some protection. The only rooster who didn't seem afraid was the clubbed foot silkie rooster named peaches. My huge EE could've easily taken him but he is young. You guys and gals think my boys will get better at this when they are older?