Answer:
I'm not man's best friend, I'm their enemy, I can mark your end, yet you do not see me, I am very small, but very tough, If you have me, then you have it rough.
Hold the tail, while I fish for you.
Be sure to shout for its answers are weak, but there is no language it cannot speak.
My children are near and far. No matter that I know where they are. The gift I give them make their day. But if I were gone they would wander away.
What can be big, white, dirty and wicked?
When is it bad luck to see a black cat?