agree with jimmy dont think you are far off the thing with yb sickness you must spot it early stages corn on perches wont come in when called etc if you spot it in your loft do not feed 48 hrs then feed very light rest of week cruel you may say but has worked for me everytime but do not get me wrong some times not always yb sickness a lot of paramyxi going round dont let this put you off most times all ok only other tip have milton in water for coming home from race the very best of luck 2010