a few years back i was having some trouble with my birds and i phoned the vets at the bush estate ,i explained what was happening to my birds and they asked me to send a bird in for them to do a P,M, on so i duly culled a bird and got my wife to drop it of at the bush estate , £36 pounds later they told me the bird died from a broken neck, :o. shocked i could not believe it phoned up and was duly told that this is how the bird died and the next time i send a bird make sure it is alive