This depends on which respiratory disease it is. It is false in most cases. Wild animals are much more a risk of spreading disease then birds that come from any flock that are not currently sick FYI.I hate to say it but respiratory disease in chickens are still bad news those that live remain carriers and you have to have a closed flock.![]()
Which makes me ponder something, why is it so many are so paranoid about bio-security, yet let their birds free range? The two are NOT compatible with each other.