Tinker

Tinker is Mrs. Galloni's cat from the Magic Kitten book A Puzzle of Paws.

A Puzzle of Paws
Rosie first meets him on her new neighbor, Mrs Galloni's, doorstep, but Mrs Galloni finds Rosie petting Tinker and shouts at her because she thinking she is hurting Tinker. Later in the book, Mrs Galloni thanks Rosie for finding Tinker, apologizes and they become friends.