killed by her pet hybrid wolves that she kept in a pen in her back yard. The county coroner said 50-year-old Sandra Piovesan, of Salem Township, Ore., was alive when she was attacked and she bled to death. Officials said most of the animals weighed 70 to 100 pounds and some were 7 to 8 years old. Humane agents said they had warned Piovesan about the animals.