I have a different situation. So stay with me. Over a month ago the coop door was left open (for the first time .....) and something got in and killed all my chickens besides one. Sunny, she is so gentle and sweet. The others always pecked on her. Anyways I got 3 new chicks and they are 6/7 weeks old now and I just picked up Sunny from a foster home I put her in so she could hang with another flock until the chicks got big enough to stay outside over night (I live in FL so it is in the upper 70s at night so they have been outside for a week now). Anyways so I am introducing Sunny to the chicks! Sunny is a year old while the chicks are close to 7 weeks. Has anyone ever introduced only one older chicken with younger chicks? I would appreciate all the input!