Collect picture of Brenda Richards ringing the bell after treatment. See SWNS story SWLEdog; A devoted dog saved her owner’s life by scratching at her chest to alert her to a cancerous lump in her right breast. Tiny Yorkshire terrier Cleo, then seven, clawed at her owner Brenda Richards as she tried to carry her upstairs to bed as usual. When Brenda, 78, went to investigate the area, she found a lump which medics then diagnosed as breast cancer. Brenda, of Derby, was given the all-clear after treatment and believes her cancer would have been missed if it wasn't for clever Cleo.