Mopsy the dog-lover(Goblet of Fire)
When Padfoot returns in ‘Goblet of Fire’, I initially had him stay with a highly - eccentric, dog-loving old witch on the edge of Hogsmeade. She kept a pack of ill-assorted dogs, was on constant bad terms with her neighbours because of the barking and the mess, and had welcomed in Sirius, assuming him to be a stray.
I think my editor was quite right to ask me to get rid of Mopsy, because she added nothing to the plot. I just liked portraying a batty dog-lover(as opposed to batty cat-lover Mrs. Figg).
However, it made more sense to stow Sirius in a nice simple cave to have Harry, Ron, Hermione and Sirius's chat about Barty Crouch Jnr. without distractions.
Dance, my puppets! Dance! *Insert creepy-beyond-believe laughter here*