http://nypost.com/2015/07/28/husbands-pit-bull-nearly-rips-wifes-arm-off/
There's a video at the link.
NORTH CHARLESTON, S.C. — A North Charleston woman is recovering after her husband’s pit bull attacked her, causing her to lose part of her arm.
Local media outlets report that 48-year-old Katherine Rizk was attacked late Sunday at her home and is in the intensive care unit of the Medical University of South Carolina Hospital in Charleston.
[....]
his wife is “not doing well” after she had to have her left arm amputated from the elbow down.
He says that he had had the dog for three years and that it had never attacked anyone. He says that the dog had been cut earlier Sunday and that he thinks the dog attacked after his wife pressed on the wound while petting the animal.
The dog was euthanized Monday.
There's a video at the link.