Do you think he is stalking your fish .The movement attracted him maybe .I know owls around here go for movement .I saw one swoop down and grab a baby bunny .That is the main reason I was so upset when king arthur passed away he was my chihuahuas protector .He would always go into the back yard first and the chi.'s would wait for him to give the all clear .I never worried when he was around .Now I worry all the time .I have seen a few foxes lately
The first time I saw him he perched in the willow over the pond and I thought either the fish or the small birds who always gather around the pond is what sparked his interest. I did not think it would try and go after the dogs as the Cooper's hawk isn't a very big hawk.
But now that this happened I searched youtube and found a lot of videos of small hawks attacking dogs. Even dogs as big as Labradors.