My husband was home today and heard our Collie start barking like crazy. He looked out the window and an eagle had landed in our chicken/duck run. The ducks and chickens were all in their respective 'safe' runs (which are smaller runs completely enclosed with chicken wire) so they weren't actually in danger. My husband headed outside anyway, and the eagle proceeded to jump out of the run and ATTACK our barking collie. My husband says it was an all out fight until he got almost on top of them, and only then did the eagle fly up to a nearby limb and perch himself there until my husband left with the dogs (we also have a border collie who was giving his best protective barks from a 'safe distance' (bless his brilliant little herding dog heart). Our Collie came out with a somewhat battered nose but proud as could be and received tons and tons of praise.
None of our friends and families ever seem to believe me when I talk about what a huge problem the eagles have been for our little menagerie here, but my husband says he will now unequivocally back me up. He says he was absolutely blown away by how big AND how bold they are. And, the eagles are 'protected' -- what would have happened if our collie had actually killed or maimed the thing? (Though my husband wonders if the eagle wouldn't have ultimately won the fight.)