Hello! New chicken lady in town!

Hello, chicken enthusiasts! I am VERY new to raising chickens. Back in March, I brought home four lovely new family members on impulse and have been on an interesting learning adventure in the weeks since. My chickens are now 11-12 weeks old and I joined the forum (after countless visits to the page for research) to seek help sexing one of my assumed pullets. I have a Black Sex Link, a Rhode Island Red, a Silver Laced, and my questionably gendered Araucana. They are all gorgeous and healthy and I have genuinely enjoyed watching them grow. They are only just within the last few days started to act more friendly with me, despite my constant attempts to bribe them with various treats for trust and affection. Any and all discussion or advice is welcome.

 

Thank you!