Answer:
Sleeping during the day, I hide away. Watchful through the night, I open at dawn's light. But only for the briefest time, do I shine. And then I hide away. And sleep through the day.
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.
What can be heard and caught but never seen?
They can be harbored, but few hold water. You can nurse them, but only by holding them against someone else. You can carry them, but not with your arms. You can bury them, but not in the earth.
It's the only vegetable or fruit that is never sold frozen, canned, processed, cooked, or in any other form but fresh
What has wheels and flies but is not an aircraft?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?