Answer:
I am an object which is used in baseball during the day I can't be seen at all
The more of me there is the less you see.
My head and tail both equal are my middle slender as a bee. Whether I stand on head or heel Is quite the same to you or me. But if my head should be cut off the matter's true though passing strange directly I to nothing change.
I lose my head in the morning and regain back it at night.
I hop around and deliver eggs at Easter.
Those with eyes bigger than their stomach will definitely leave the restaurant with one of them. It is named after a house pet as well.