Hi Billy, its not a maybe m8, its a fact that some birds spew while getting bumped about in the car on way to the marking station.I know a guy who scored with a hen in 2 channel races last year,( well up in west sect ) and his pigeon was sick in basket on way to marking.OBS vomitting at the loft can defo be a sign of candidia or wet canker, amongst other things.ps. Ive got YBS now, feed on perches this morning.Same time every year and I tried like fk to avoid it this year. So, im now puzzled about the vaccination thing being linked ??