We have many breeds that are between 3-4.5 weeks old, and currently by far our sweetest breed is our BO's - both of them are the first to jump in our arms. Closely followed by 1 of our Easter Eggers and our only SLW. Even when we are moving stuff around in the brooder and all the babies scatter, the BO's are right there with us trying to figure out what we're up to. I just love them!!