Dallas has a stray dog problem - about 9,000 of them. And some killed a woman

A deep growl came from the other side of Shaniqua Roland's front door. She was pregnant at the time and headed to a doctor's appointment, but she knew she couldn't leave the house. For half an hour, as she tried to shoo them away, a pack of pit bulls snarled and snapped at her metal door. She thought of her sister, who'd recently lost a chunk of her calf in a dog attack. She'd see her doctor another day.