The Speckled Sussex is absolutely a cockerel. The RIR and Australorp on the ground look to be cockerels as well. The RIR and Australorp on the crate look like pullets.
The correct ratio is 8-10 hens per cock. So for 3 cocks you would need 25-30 hens.
Cockerels raised together won't fight much. There might be an eventual tussle, in which one will come out on top as the dominant male. He will prevent the others from mating the hens when he is around and may force them to wait to eat until after he and his hens are done.
Edited by Rhodebar Lover - 12/30/15 at 5:58pm