Trichomonas is not uncommon in poultry, it is easily spread via the communal water source, and this in turn easily contaminated by wild doves and pigeons (a common source). E.coli and Salmonella are similarly spread.
Now with CitroSan we have the means to do something about this problem. CitroSan is extracted from oranges, it is non toxic, GM free and a natural sanitizer against a wide range of pathogens. It acts to maintain a natural immunity too! A real boost for young birds.