In general, pets bring happiness and comfort to our lives.
But as these photos prove, they can occasionally transform into agents of macabre mischief.
Wacko Jacob has created a spooky gallery from around the world showing pets caught giving heebie-jeebies to their owners.
Whether in a shady nook or hidden under the covers, our furry companions are masters of disguise – until they pop out in a frightening way.
Whether it’s a bold ambush or a harmless game gone wrong, these snaps are sure to get a laugh… eventually.
Eye-eye! A late night encounter between two cats startled an owner when only the visiting cat’s eyes were visible
As expected, cats and dogs turn out to be the main culprits – with a special appearance being a scary house crow that was caught with a kitchen knife in its beak.
A black cat looks like a ghostly apparition after falling into a bowl of flour intended for baking.
Meanwhile, a dog’s mouth turns into a huge, creepy smile – it looks like it’s ready to devour you.
Here, FEMAIL takes a look at some of the world’s scariest pets…
This ginger cat has excellent balance but would freak out anyone who spotted him
In a worrying photo, an impressive crow was photographed with a very large knife in its beak
A gray cat proved to be an eerie distraction from the television as it sat staring with its knees drawn up to its chest
Are you looking at me? In a spooky surprise, a white cat on the windowsill stared at its owner through the curtains
A pet owner was terrified when his dog jumped onto the bed with a fork in its mouth
A black cat looks like a ghostly apparition after falling into a bowl of flour intended for baking
Here a hamster fell asleep in a creepy position, his mouth tightly gripping the hamster wheel
A dog’s mouth turns into a huge, creepy smile – he looks like he’s about to devour you with his scary teeth
In this case, a cat could be in contact with the spiritual realm – as it sits ghostly, staring at a blank wall