I have 3 roosters at the moment and have an additional young one. I have no idea what tractor means in this context But I’ll try to help. We don’t cull our birds unless absolutely nessesary (As in- they are dying). I live in VT, and it regularly gets below 0 degrees ferinheight during winter. You have more options than re-homing and killing. last winter we put all three in a coop together. the coop was too tall so we had issues with frostbite and 2 of the Roos would kick the other one around so he did get some severe frostbite. though this could have been avoided if we had managed the coop situation better.
this winter they will be in a coop that’s much shorter, you want a space that’s fully enclosed and not large so their body heat can keep them warm. make sure you also have plenty of bedding on the floor and use the deep litter meathod! that was the other issue resukting in such bad frostbite, we didn’t have our litter as deep as we usually do for winter. if you have a coop that’s a bit big for them or needs extra insulation take old feed bags and stuff them with dead dry leaves, straw, hay, or something like that and staple them to inside of the coop. Does wonders! We don’t use heaters for any of our coops and only 1 has any insulation and that’s with the stapled feed bag meathod. Your roosters will probably get some frostbite on their combs- that’s fine. If they get it on their waddles you have an issue.