attacked by a pit bull. battalion chief, john whiting, was mauled when he responded to a house fire in unincorporated san leandro over the weekend. an investigation has now been opened into the dog's owner. >> reporter: with heavy hearts, a crew from alameda fire station crew 24 continue to respond to emergency calls, on the minds of many, a speedy recovery for battalion chief, john whiting, undergoing treatment at stafford hospital for facial wounds after being mauled by a pitbull. pictured here, the 1.5-year-old people responsible for the attack has since been quarantined, neighbors that live next door to the scene of saturday's fire in the unincorporated san leandro say that the dog was dangerous. >> that pitbull, as far as we know, just passing by, that dog is always aggressive, jumping up on the gate and barking all the time, he is a pretty aggressive pitbull. >> reporter: there were 20 dogs