I've had more than three batches in the same brooder before I put new birds in clean the floor out disinfect and reapply new quarry sand in the bottem temp is perfect box is 4x4ft has a vent and fresh water and food daily as well as a kitty litter scoop cleaning poop out every three days but seem to loose a bird every day or two I know some just dont make it! Anything I can give them to prevent disease and reduce stress one of my hatches lost 15 in one night... Only the strongest biggest chicks make it off the light and outside but the amount I'm loosing is awful out of 60 that hatch only 15 average to adult more than 3-5 weeks