I own five red sex link hens and was wondering about adding a rooster. (they are about 7 months old and are all laying) Is it ok to buy a rooster off craigslist? Would he need to be quarantined? If so for how long? Should I worry about frostbite, there's about 2ft of snow and the temperature gets down to between zero and fifteen degrees at night in the winter? Is it ok to get a Roo in the winter? I definitely want to free range the girls, would a Roo help protect them? Any advice? First time chicken owner, please help!