I also purchased 6 young hens from a breeder outside of Toronto. They are the same breed as my chicks but were 7 and 8 weeks old when I purchased them 2 weeks ago. They are now 9 and 10 weeks old. They should start laying any day now.
They are living in a rabbit cage in my shed until it gets cold, when we'll move them into the garage where they will have lights until spring.