As soon as dogs hear a sound at the door, they up and howling at the mystery visitor on the other side.
But while most pups will simply scurry into the hallway, bark for a bit and then let it go, one dog clearly got far too excited:
Locals in Fife, Scotland, could not believe what they were seeing when a fellow resident shared a snap of a dog with its head hanging out the front door on Croftangry Road in Kelty.
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And by that I don't mean that the door was already ajar and the cheeky pooch poked its head through the gap. Oh no.
In the bizarre clip, the canine canine can be seen tearing a hole through the uPVC door, where the letterbox should have been, chomping away at it until it's able to get its head out.
A snap taken by a passer-by was later shared to the Fife Jammer Locations group on Facebook, someone joked: "Different kind of ring doorbells in Kelty."
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The snap, which has been liked over 2,000 times since it was shared, left many wondering whether it was real or not.
One user said: "A walked past it going to the nursery was just sitting with its tongue out looking about."
Another said: "I wonder what I was hearing earlier. OMG!!!"
"Seen this n fried ma head this morning ..now av seen the vid it makes more sense...what a loopy dog n poor owner dealing wi that lol," put a third.
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While another added: "Imagine phoning the council and saying, 'I need a new letterbox and half a door as my dog has gnawed its way out'."
However, while many found the scene quite amusing, others said it was no laughing matter.
Some claimed that it was a sign the dog was distressed.
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"Dogs do this cos they have anxiety," said one user. "My German shepherd come through two doors when my daughter was born. Had to take her with me anytime I left with the daughter.
"Dog trainer told me she wanted to protect the kid."
Agreeing, another commented: "Dunno y folk think this is funny. Poor dog obv stressed or bored."
"Hopefully the dog doesn’t hurt itself or others. Must be so stressed. Poor thing," added someone else.
Topics: Animals, UK News, Viral, Facebook, Social Media