Only thing that makes sorta sense would be if "her" dog was only hers because someone else dumped it off on her.
An ex, a child that moved/had a life change n couldn't keep the dog but pressured her to take it on, that type of thing.
In that case, it wasn't a pet but a millstone around the neck and eventually something was gonna break.
She could've literally left it leashed to a stall and someone would happily take it home.
But she had to lowkey hate the animal so did this ish to wipe her hands of it.