Welcome to BYC. Glad you decided to join our flock. X2 on the links that Yorkshire coop has provided you with. If you haven't done so already, definitely check out our Learning Center. There is loads of useful information there. The two breeds you have chosen are both very cold hardy when fully feathered. Just make sure that their coop is draft free, dry, and well ventilated to prevent moisture from building up in it. Feathers are wonderful insulators and moisture is a much greater danger than cold. Please feel free to ask any questions you may have. We are here to help in any way we can. Good luck with your chicks.