started parastop(liquid) 3rd Nov finished 15th Nov followed by 3 days multi vits. paired all birds (17 stock pairs and 16 pairs racers) on the 26th dec. all pairs by the 7th jan had laid. 16th Jan floated stock eggs to race birds. had 2 clear eggs from 2 stock pairs all other eggs where full. racers all full. hatched rate 100%. lost 2 chicks at 6 day old, wrong hen bird in box and killed them (Won't happen again).stock birds 2nd round started laying 26 jan all full all hatched. a week away from weening the 2nd round now. the best breeding season to date whether pre treatment had anything to do with it. must add the birds did have plenty of grit, minerals, fresh veg every day.