Have your Dad read this story, this little Yorkie was taken by a hawk from a front porch.
http://www.doggienews.com/2004/12/ha...re-terrier.htm
Animal Rescue states that hawks have been known to take 4 to 5 pound animals. We have two huge hawks around our house...the family next to us has/had lots of pet/wild bunnies. The hawks have killed all of them. One day I was sitting out by our pool and a hawk flew over me with a HUGE snake in its talons. (the snake was at least 3 to 4 feet long)

Needless to say, I keep my little guy on a leash.