While all dogs are nothing short of wonderful and deserve all of our love, sometimes a particularly special little pooch comes along and completely steals our hearts.
Take Lulu, a 'sweet, very calm and affectionate' pug - who just so happens to have six legs.
A woman called Helga Carter posted pictures of adorable Lulu into a Facebook group for dog lovers called Dogspotting, showing off the doggo's incredible extra two hind legs.
Helga wrote: "A 6-legged pup!
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"A parent at my school brought in this tiny pug named Lulu, who was totally unfazed by the large excited crowd of kids cooing over her.
"What makes this little girl super-special is her extra two left hind legs! She uses the outer two to walk and the one in the middle just hangs there.
"The owners will see as she grows if they will need to amputate any or all of them."
In a later update responding to questions in the comments thread, Helga explained that Lulu's extra two legs could be down to a rare 'natural occurrence'.
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Normally breeders put dogs like Lulu down, but Lulu managed to evade her cruel fate and was put up for adoption and now lives happily with a family in Surrey, British Columbia.
Helga continued: "These extra two legs were possibly from an undeveloped twin that was partially absorbed by Lulu while in her mother's womb. Not sure this is an overbreeding issue - maybe a rare but natural occurrence?
"Lulu's owner told me that typically a breeder would put a newborn pup like this down.
"Happily, this breeder put her up for adoption, since she couldn't be sold.
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"She is so sweet, very calm and affectionate, and definitely not in pain. Celebrating the specialness of this little survivor."
Lulu's not the only example of such an interesting phenomenon. Over in the UK, there's also a Labrador-cross called Roo with a similar condition.
Lauren Salmon, 33, from Orpington, Kent, bought Roo from breeders in Essex earlier this year after her son spotted the special pup online.
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Lauren said: "When she jumps up on us she looks like a kangaroo, hence the name.
"But when she walks, she sort of staggers on her elbows with her bum in the air, like an army crawl.
"It's sad but it's cute at the same time because she is so full of energy."
While Roo doesn't appear to be in any pain, Lauren has contacted Dr Noel Fitzpatrick - the specialist who stars in Channel 4's The Supervet - to see if he can help to improve Roo's mobility, as her extra legs get in the way when she's walking.
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Lauren said: "We absolutely love Roo to pieces.
"She's is just a normal dog to us - just with a couple of extra bits.
"Her special legs don't cause her any pain, and it's easy to see just how full of life she is.
"She's full of puppy energy, so we'd describe her as placid but playful.
"There are not many dogs like Roo out there.
"I think the breeders kill them off because they're not worth anything, but to us she's priceless."
Featured Image Credit: Helga Carter/Facebook