i'm your host, professor bob rucker. you see dogs everywhere here in the bay area and most of the time they are approachable, friendly, and loveable. but what if they are not? as cassandra pena reports, there's more and more regulations to deal with dangerous dogs. >> at the park in san jose, don marshall wilson's outing with her dog turned deadly this april. >> i was riding an adult tricycle around this path here and when we got up to approximately where that light post is over there, i saw these dogs coming across this open field from over here, and they just ran as hard as they could. >> reporter: he says the dog attacked her huskey. >> so i got off my bicycle and went over to where the dogs were just chewing up my dog and started beating on them violently with my bicycle chain. >> reporter: the 13-year-old huskey suffered severe injury. wilson was cut and bruised. >> i suffered a lot of bites on my hands. i have a pretty large contusion on my face. i had stitches on my lower lip. >> reporter: but the pitbulls ran off