For 180 fleeing Brazilian prisoners, a dog's bark was indeed worse than its bite.
A 10-month-old mutt adopted by Rio de Janeiro prison guards foiled a mass prison break with its barking as a gang of inmates tried to scale the prison walls early Tuesday, a prison spokesman said.
In an ensuing shootout, one inmate was killed and seven prisoners, one guard and the dog named Pam were injured, but no one escaped.
"Pam is going to be fine. We are paying for a private veterinarian so he can get special care," the spokesman said.