I let my 4 year old feed treats to the chickens but I never allow him to kneel down or lean over, just to be cautious. He can only pet them if I am holding them, too. I had a few instances with peckish hens, but I’d peck them back with my finger, and it worked just fine for establishing dominance. As small as she is, a stick is probably a good idea because her shorter height and arm length may make her an easier target.