Unless they were rescue birds who were being rehabilitated or could never return to the wild, I couldn't agree with it. Captivating wild birds, or breeding an animal to live a captive live, is in my opinion wrong. Whether it's dogs or birds we shouldn't be breeding captive or dependant animals for human gain. Furthermore falconry is associated with hunting which is another thing I don't agree with. All in all, I'm not sure it could ever be something cruelty free, unless as I said it was with rescue birds.