Frost bite leading to the loss of an extremity does not cause sterility in roosters.
Cutting off combs such as in dubing also does not cause sterility in roosters.
Of course, if it is cold enough and moisture is an issue leading to frost bite, heat as one deems necessary as that will both increase temperature and lower relative humidy, the two items that contribute the most to frost bite.
For my flock, no heat added, sleeping under a TARP in an open run by choice in the damp PNW... and never a single issue with frost bite. I don't add heat and they don't choose to go inside. HOWEVER I also don't raise seramas or naked neck birds. The silkies do just fine too under all their fluff. If one has sub zero temps and negative wind chills, they might consider twice before buying a flock of leghorns with 2-3 inch tall combs. Some breeds do better than others in cold weather. I chose a rose comb cochin x as my flock rooster. No worries about not having enough feathers or having a comb sticking out to get frost bit.
Cutting off combs such as in dubing also does not cause sterility in roosters.
Of course, if it is cold enough and moisture is an issue leading to frost bite, heat as one deems necessary as that will both increase temperature and lower relative humidy, the two items that contribute the most to frost bite.
For my flock, no heat added, sleeping under a TARP in an open run by choice in the damp PNW... and never a single issue with frost bite. I don't add heat and they don't choose to go inside. HOWEVER I also don't raise seramas or naked neck birds. The silkies do just fine too under all their fluff. If one has sub zero temps and negative wind chills, they might consider twice before buying a flock of leghorns with 2-3 inch tall combs. Some breeds do better than others in cold weather. I chose a rose comb cochin x as my flock rooster. No worries about not having enough feathers or having a comb sticking out to get frost bit.