Very crafty and intelligent birds, they will sit next to your birds for months and not touch them, thus giving your birds a false sense of security, then out of the blue, they pounce, and kill. I have also known them actually going into a loft and picking youngsters out the nest, or ripping their heads off through the doweling of a sputnik. As with BOP, you need to take action.http://forum.pigeonbasics.org/public/style_emoticons/default/emoticon-0138-thinking.gif