We a small flock, one rooster, 13 hens. We got them last year as chicks. The chickens will be a year old in July. I've taken 2 as pets, the rooster and one hen. My rooster, Henry allowed me to pick him up. Lately, he pecks if I try to stroke his back or my pet hen. It's not a lot of pecks, just one or two. Is he becoming aggresive? Do I need to be concerned? I would like to pick him up but I'm a little hesitant.