i have came across some very kind fanciers i have had around 20-25 fanciers offering to breed me pigeons, baskets been given to me, perches given to me ect.
but i bet there is a few fanciers that think of there selfs i have never came across one.
oh yes i have had the problam before put potatos round the nest or just leave it i have ybs bred for me of a local who had the same problam and now is flying fine and is walking around pefect i would say just leave it.
well if they are magpies there brilliant ;D ;D they are crackers the ones you sent me jim lets hope they do me proud like you pigeons have done you proud.
i know a bloke who had a yb back after 2 years from a first time off the loft roof, when it was back it was fine, fit ,and healthy god knows where it had been.