Harry c
Gold Member
Just start the tractor and drive it out. It doesn't hurt you and won't hurt them if you don't just let it sit there and run. No different than a pet being in a normal garage. Diesels put out less Carbon Monoxide than gasoline engines. Even though birds are more sensitive to the CO than people, it would still take considerable time to accumulate to a hazardous concentration. As for up in the rafters, CO is heavier than air so it won't hang up there.