I doubt you'll hurt them by handling them. I found I just didn't have enough time to handle each one every day, but I did pick out a few unwilling "victims" each day to get handled. As they got older, I began to grab my favorites every day, so some of them didn't get handled as much as others. Now at 21 weeks old, my "favorite" and the one I handled the most is one of the most shy ones that won't get within arm's length. I have found that when they start laying or are about to lay, they get much more affectionate. My one hen out of 11 that is laying will wait for me to approach her, and will squat and let me pet her. My one that is about to lay will come to me and let me stroke her back one time, and then she leaves. The rest have to be chased down to be petted, but once caught, they put up with the lovin'.