sorry to hear this , a hard lesson to learn but one hopefully you wont have to go through again , you should get your droppings tested 8 weeks prior to pairing , then again 8 weeks before racing long term this is the most effective way and works out cheaper long term as you get to know the vet and can talk with them about any queirys you have , if you feel any bird aint right then get them checked out by a vet , all the best for 2010 i wish you a great season ahead