This chicken appeared in my backyard 2days ago and hasn't left.

As the title reads this chicken came into our backyard. I'm not sure what kind of chicken and don't know anything about chickens. I've searched some things up on the Internet like what to feed it so I've been giving it water and food because I don't want it to starve. I feel bad it's cold out and im assuming it just sleeps outside. The chicken now comes up to me. I've referred to it as "King Cluck." I talk to it and I let them know I'm a vegetarian so I come in peace. Does anyone have any idea if this is a boy or a girl or any information? Thank you.