Billy can only speak for myself,but none of mine died,some showed no symtoms whatsoever.i noticed it monday afternoon,the week of the first race.i had them training at cumnock that morning and they beat me home.i always check the doos in the basket before release and noticed some droppings colour of mushy peas.as the day went on the doos looked as if they had been to a hard race.i fed them as normal that evening and as the night went on some birds were being sick(y/birds).in the morning the birds had been sick through the night and some some still doing it as i was in the loft.droppings were dark green and slimey and some wet,some both.did hear from others though that some of theirs had died on them.