You know what's the most useless without an ounce of usefulness creatures on earth?
Cockrroach. Kecoak.
Smell. We know they're plentiful from its smell.
Hygiene. Walks everywhere. Shit everywhere. Poop everywhere. Eat anything.
Unpopular opinion, but dogs are literally the worst creatures to live on Earth.
The main issue is hygiene—the animal has no reservations about shitting or puking on the floor. And the smell that comes with them is so gross and seems like an unavoidable consequence.
They bite