According to news reports, a shar pei pit bull mixed-breed dog fatally attacked a 3-day old infant in Fresno, CA. The mother had left the child only for a moment when the dog, that she thought was chained in the back yard, entered the house and attacked the infant. Fresno police Lt. Dan Macias said this appears to be a tragic accident and no charges are expected to be filed. The dogs are in the car of animal control until the investigation into this tragic dog attack is completed. This heartbreaking dog attack reminds us that even the friendliest family pet can turn vicious without any warning. Simply because a dog has never acted aggressive or bit a person is no reason to assume the dog will never become violent and harm someone. It is better to take precautions before a dog becomes violent.