if it isnt that you can go down the route i went and done,went to pigeon shops explained symptoms they were coming out with loads of sh*t o its cocci o its canker you need this this and this! What did it do sod all if in dowt get the test done its the only way to be sure, and also forgot to mention is what i done! but once they had it i personally dont think there any good and i think they will be carriers, dont quote me on my last statment about carriers but is what i believe