What does it mean when your goose "trembles" its head and neck? Is this a sign of submission or aggression? What about when they lower and curl their neck towards their body? I am pretty sure when they stretch their neck and "yell" at you they are being aggressive. I was just wondering about the other "body language". Last question for all you waterfowl owners out there. My first two goslings are almost fully grown. Their feathers are coming in nicely. At what age and how do I integrate them into the flock without worrying about them getting their butts whooped or possibly killed by the adults??? I have two hens setting now and the males are all just hanging out so I thought it might be best to get them integrated before the goslings get here.