Going to say this just once don't really give a .*expletive removed* what the top results guys say or post . Every athlete needs a health program end of . When racing my pigeons they will be tested by myself and given what ever they need . But with a four/ five week prevention program. I've never had a major problem. My pigeons just now get .*expletive removed* all but tomorrow morning when I go to my loft and one bird was showing signs of anything I would not hesitate to add something to the water.