Answer:
Stealthy as a shadow in the dead of night, cunning but affectionate if given a bite. Never owned but often loved. At my sport considered cruel, but that's because you never know me at all.
I bind it and it walks. I loose it and it stops.
We are five little objects of an everyday sort, You will find us all in a tennis court.
Whoever makes it, tells it not. Whoever takes it, knows it not. Whoever knows it, wants it not. What is it?
What tastes better than it smells?
What flies without wings?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?