One of my 4 week old Buff Orphington chicks is getting a little nasty, when I put my hand in the brooder to fill the water or give them feed she comes after me and tries pecking me. Do I give her a slap, do I yell at her, what do I do to stop this behavior? It's getting me to be afraid, I don't want her to make me feel like this. This is my first attempt at raising chicks. Thanks, any ideas?