they are fed on natural young bird which is very small like gerry plus these young birds are 1st round jan hatched , i had same last season , but it happened when racing i won the 1st two races 15th fed followed by 2nd fed and 99% RETURNS then leading up to the third race 40 young birds were normaly fed 20oz am 30 oz pm but they would only eat around half that ie 40 ybs 20-25oz i only sent a smal team to that race but lost 30 % the remaining birds were treated with tylan and food cut down to 10oz am + pm to get appitite back whitch it did and they won another 7 races , but i would just like to know why it is happening again when treated reg with tylan and other good products for cocci/ trico /worms and reg use of cider vin ????? and most important what is it !!!!! :-/ :-/ :-/ :-/