Ender dragons, withers, and pufferfish can rapidly destroy shields

Withers, ender dragons and pufferfish can attack your shield rapidly that it drains the durability bar of the shield.

Causes

-Ender dragons swooping towards the player and rapidly hitting the shield.
-Withers using their dash attack and can raipidly hit the shield.
-Pufferfish, when fully puffed, rapidly hits the shield.

How many hits is needed to destroy a unenchanted shield?

-Ender dragons (2 hits + throws you into the air)
-Pufferfish (Needs verification)
-Withers (9 hits when using the dash attack)

I have not tested this with an enchanted shield but can easily be destroyed anyways.