Good Riddles

Question: What laughs while stalking prey, but never goes in for the kill?

Question: A farmer has 10 cows, all but six die. How many are left?

Question: I am very strong and tough but can be broken in some ways. What am I?

Question: What has a lot to say but can't be heard because it can't speak one single word?

Question: Why was the mouse afraid of the water?