I've got 4 chicks that are about 4 wks old and mean as can be to us. They attack when I take out or put in their food and water dishes and fly out trying to attack when I open the door to their brooder. We have them inside and have handled them so I know it's just them being mean. So, my question is....What is a good age to butcher them? I've got 1 Hamburg pullet that will be eaten, 2 Cukoo Marans (one is a pullet and the other I'm not sure about), and 1 New Hampshire pullet.