An unlikely duo have formed an unbreakable bond and prefer to hang out with each other than any other animals.
Sven the Newfoundland and Olaf the duck have been best friends since they first laid eyes on each other two years ago.
The adorable dog and duck do "absolutely everything" together, from shopping to sunset walks and swimming in the paddling pool - they even love cuddling.
Jessie Vallier, 33, rescued Olaf and Sven one month apart, and says her favourite memory is the moment they met.
She reminisced: "I was calling for Sven in the garden and when he wasn't running to me, I went to look for him, only to find him floating in the pool with Olaf."
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The mum-of-two from Broken Arrow, Oklahoma, US, now documents her pets' day-to-day adventures for the rest of the world to enjoy.
Jessie said: "Their relationship is so natural, they've been super close since the start and are still going strong two years later.
"They share such a great bond, it's so wonderful to see. They absolutely love doing everything together.
"We have a small paddling pool where Sven will lay down, and Olaf will jump in to hang with him.
"They're honestly in their own little world all of the time, and each day to them is like a new adventure."
The horseback riding instructor says their relationship is so solid, that even love interests don't get in their way.
She explained: "We got Olaf with a few other ducks, but unfortunately lost the others to a coyote attack.
"So, when Sven came into the picture, Olaf just sort of imprinted on Sven and hasn't left his side since.
"It's kind of like they've formed their own little wolf pack.
"I read somewhere that if you get a female duck for your male, that she will be his main focus.
"So, I did that for Olaf, but he just runs away from her.
"He was terrified of her for about two weeks, and he'd run over to Sven not knowing what else to do.
"He definitely thinks he's a dog too at this point and is more interested in hanging out with Sven than his lady friend."
Jessie loves watching the pair playing with her sons and says they all adore each other and it's "always a cause for great laughter and joy".
The inseparable duo have found fame on TikTok and even inspired Jessie to write a book called The Adventures of Biss and Olee , which has already sold 1,000 copies.
"It's just lovely to share their journey with as many people as possible, and to spread joy," Jessie adds.
Does your dog have an unlikely friendship? Email nia.dalton@reachplc.com.