Monoprop from the German company Koiko, which is a powder mixed with the grains provided daily to birds. It sterilizes the grains and kills the grain mites that are invisible to the naked eye. It also prevents mold, fungi, and bacteria. It has a direct effect on resistance to infection of the airways and respiratory system of birds from the effects of flying dust from food and the dust present in most grain mixtures. It also absorbs toxins from the bird’s body, facilitates digestion, and reduces death rates. Noticeably, most of it is due to fungal contamination, which has no signs on the bird that the breeder can detect.