Maybe they flew south. Were their wings clipped. Talked with a guy at TC who raised some and they flew south for the winter. Then they came back the following spring. Might seem far fetched, but it's possible.
One of my pullets laid two eggs today. She is one of two RSL's that is about 17-18 weeks old. I'm quite pleased, since I raised them from chicks. They are showing up my five RSL hens who only lay 3-5 a day. Highly recommended breed. I love mine. They have very sweet dispositions. Maybe...