Dotty Dog is a volunteer nurse who is training at Peppatown Hospital.
Because Dotty is a Dalmatian she is not a dark brown dog. Her fur is white with black spots and she wears a blue dress. Her dress stops at the knees and it leads down to her black boots. Dotty wears her black boots with pink stockings. She occasionally wears a lavender jacket and a pink pillbox hat.
- Dotty may have been named after her fur as it has black spots and Dotty refers to her black spots as "large black dots".