Blanks are fake/prop bullets basically, loud bang (though if you put one to your head you'll still die). And the comic is saying the animals found out he's just making a loud noise and can't shoot them so they're spreading the info around.
Someone who's ever actually shot a gun feel free to chime in.
Pretty much, though blanks aren't actually bullets, they're rounds or cartridges. The main difference between blanks and regular rounds/cartridges is that blanks don't have bullets (the metal bit which gets shot out of the gun)
They still have the gunpowder though, so like can@sh.itjust.works said, they are still dangerous due to the explosion that no longer has to propel a bullet.
They often have more powder than a live round too.
When filming The Crow, a dummy bullet without powder or a real primer was loaded into a revolver for a shot and nobody realized the bullet fell out of the fake round into the barrel. So when the same revolver had blanks loaded into it in a later shot, the overcharged blank propelled the bullet from the barrel, killing star Brandon Lee.
The main difference between blanks and regular rounds/cartridges is that blanks don't have bullets (the metal bit which gets shot out of the gun)
Ah, should have caught that after watching videos of it being animated with the whole cartridge being propelled out. I wanted to say "shell" there but I assume that's wrong too?
Generally, shell is used to describe explosive projectiles/payloads or ammunition for shotguns.
In contrast, bullets are specifically projectiles that are sent through the barrel of a firearm when the propellant inside a round/cartridge is ignited. The casing (which contains the propellant and holds the bullet in place) is what is ejected after firing. The round/cartridge is the package as a whole.