when paratyphoid hits you can expect to loose many birds not many to start with but as time goes on you will find some more going down mostly it will hit the hens you can find them trailing a wing and going light some will die then you will go to the loft one day and for no reason find a cock dead that had been out flying the day before it seems to go on from season to season even in pigeons that dont fly out keep a eye out for rats, mice, check your feeding feeding in dry clean places clean or lofts that have deep litter it is all the same when it hits it is too late.