Choice riddle.

[BlindManDonny]

There once was three boys, Alex, Peter, Will, who fished together all the time. They secretly did not like each other. Peter carried a Spider. That Spider would die at the paws of a Dog, this Dog was kill by a Hawk. So what killed the Hawk?

R.S.B.

This is a unique riddle. Post your answers, also with why you believe your answer to be right. There is an answer and explanation. I await your answers.