I think Amber's last bantam that she picked out (Silver Sebright) is a cockerel (5 weeks old). Still a little too early to tell, but likely. So we have 4 bantam pullets, and 1 bantam cockerel in our small pen. (that's the way our luck is... I should have let you pick out the Sebright too. LOL). Not sure if Oliver would fight with the Sebright if they only have 4 ladies between them. ? If you don't get any takers by the time he's crowing he can come here. I have 2 pens (one for full grown/layers, & 1 for bantams/chicks) and each pen already has 1 roo, but we could work something out. I feel bad that you picked up all the chicks and the one you kept ended up being the only boy in the batch. Let me know.