It's getting a little nippily out here, and I got two dogs. They stay outside 24/7, unless it gets too cold or extreme rain (yeah, right). So, how cold is too cold? They are both medium sized (25 and 30 lbs). One is a 12 yr old female with shaggy fur, one is a 6 yr old male with short fur. They have carpet on the porch and are generally out of the wind. The male is a rescue dog, and has issues-- he refuses to go into an igloo, so that is not an option.