Buckeyes are notoriously difficult to sex *(even among Buckeye owners) which is why you aren't getting many replies. Comb size is just not a good indicator with them, but this ones comb appears to me to be pretty red and it appears to have some pointed sickle feathers coming in so I'm leaning toward a cockerel on this one. If it lays an egg later, you'll know I was wrong. ) I hope for your sake I am wrong.