When people at The Mayhew urged him to reconsider, as the shelter was already overwhelmed with a surge of unwanted dogs dropped off after Christmas, he appeared to change his mind.
Instead, however, he went out onto the street and tried to pawn the dog off on strangers walking by.
People at The Mayhew decided to take the puppy in right away, despite limited space and resources. They named her Ella.
"It is completely irresponsible to sell a puppy outside on the streets," The Mayhew's head of animal welfare, Zoe Edwards, told The Dodo in a statement, "but unfortunately we see this kind of situation all too often."