Anti blackhead brooder? Your birds cannot get blackhead inside a brooder. Just do not put them on the ground. You can brood the birds in a plastic tote, fishtank or wood box. I then use a large dog cage and build a wooden frame add some hardware cloth and place it in the bottom of the cage to keep them up so the poop goes through the wire. They can stay in that for a few months. You can also keep them in a shed just place pine shavings on the floor. I hope you do not have to go through what you went through last year, taking preventive steps will deffinately help you. Remember to worm them a few days after they hit the ground. Good luck with your hatching, be careful with brooder hens, some seem to quit before the egg hatches.Now all I need to do is build an anti-blackhead brooder and enclosure, no way I want a repeat of the last two years!