The Dogs Trust spokeswoman appeared via video link from the charity's kennel in Whitstable, Kent, to encourage viewers to think twice before buying a dog as a Christmas present.
She revealed some of the most shocking reasons people had for giving up their dogs, including that the puppy ate meat and didn't match the furniture.
One owner complained their dog was scared of aluminium foil while another was frustrated that it always sat in front of the television.
However it was Elf's story that left viewers particularly horrified, with dozens taking to Twitter to blast the colleague who had given the dog to their co-worker.
"Poor pup, this story makes me so mad," one tweeted.
While Elf initially struggled when it was first dropped off, the puppy has since been adopted and spent its first night at home yesterday.
Dogs Trust also encouraged people to come forward if they couldn't properly care for a dog, no matter how embarrassing their reason.
