Here is a link to some pics of our meat birds over the first 4 weeks. My kids are measuring them and weighing them each week as a homeschool project. They really do grow fast compared to the layers we got on the same day. http://picasaweb.google.com/tomsgonefishing/MeatBirdDevelopmentWeekly Take a look at the Week 5 pics. There is a Delaware pullet that is also 5 weeks old for comparrison of growth rate.