We are new to this and bought dual purpose breeds instead of Cornish X. Oh well, it hasn't been a big deal but I thought they were looking big. We butchered one this weekend and he was tiny. How many weeks or months do they take? Second, my mom thought they are not putting on weight as fast as they should be because they are free ranging during the day. So we are basically planning to have them still in the chicken tractor but stop moving them around. Forcing them to eat more feed than grass. Thoughts on this? They are about 12 weeks.