Sexed the chickens WRONG

So, one of the chickens that I though was a female started crowing yesterday! And I think that one of the silkies is also a ROO! LOL!!! So I have been getting awakened every morning by not one but two roosters and soon to be a third! This is not good as you should only have 1 rooster to every 4 hens. So, we will be having roast chicken and then taking the bones and making chicken stock! Just so you know, I will not be killing Buster cause he is just too cute. One of the Japanese bantams has started crowing so he will be the first to go and then when the Silkie starts crowing he will be gone as well. Tyler is more hesitant about me killing them he wants me to post them on freecycle but I don't want to do that because I bought them with the intention of eating them. So, I am currently researching the most humane way to kill them and also how to clean them out and such. I will probably do it this weekend while my MIL is here if not it will have to wait till the end of the month cause my BF will be out here with her kids the weekend after that. Anyway, just thought it was humorous and wanted to share. I have included some video of the Japanese Bantam crowing and the other chickens hanging out.