I have a cheq pied yearling cock who has raced very well this year actually was proving to be one of the better one,s after a race of approx 180mls he homed very well but looked a wee bit tired when one's returning after him did not, Sent him to 200 plus the following week again up with the leaders but again a bit tired looking so decided to stop him as I was not happy as to why this was happening ,He has been in a section with the other cocks and moulting fine ,I feed water and clean them each day but am not one for handling them when there is no need ,noticed his wing a bit out yesterday and on examination found a very large lump like blister hanging from the underside of his wing ,took him to the vet who put him to sleep and removed it she says he came round really well and is of good health but there are other smaller growths on the other wing she thinks it may be cancerous and to keep an eye on them as they can be removed if they get larger ,never in forty plus years seen anything like this ,anyone know what it could be ,He eats well and shows no signs of illness as the vet stated replies would be appreciated thanks Mick .