Sally-Ann, who is 5ft 2in and weighs just 7st 10lbs, jumped in front of the buggy as the Rottweiler attacked.
Clamping its jaws over her right arm, the dog dragged Sally-Ann down the street.
"It weighed around the same as me so I was like a feather in its jaws," says Sally-Ann, who lives in Chatham, Kent. Residents rushed out and wrestled the dog away. Two operations and several skin grafts followed, and she has since suffered a heart attack.
"I'd do it all over again if it meant Bobbi wasn't hurt," she said.