Sweating Bullets

I know a magical creature on The Island Of Strange Beasts called the Winchester Panda.
It literally sweats bullets.
The more frightened or warm the creature gets, the more bullets it sweats.
The caliber, too. From small derringer shells to full metal jacket 50-cal machine gun rounds.
Their nesting areas look like ammo dumps, bullets strewn everywhere.
The Army tried to raise these things in captivity to cut down on munitions costs, but they only thrive in the wild.
No, we don’t hunt them. They don’t taste good, and their pelts are rather shabby.
But they hunt us. Keep quiet!