I'd say the potential to surprise an owner is always there. They will kill children.

Chains make dogs mean. People who keep their dogs chained have no business owning their dog to begin with. If they want an alarm system, they should buy one.

Anyone capable of this kind of cruelty poses a serious risk, not just to animals, but to fellow human beings as well. Communities should be concerned when animal abusers are found in their midst. Research in psychology and criminology reveals a consistent pattern of cruelty to animals among perpetrators of violence toward humans.

The dogs are starved to make them mean. They are fed gunpowder and hot pepper before a fight, and they are regularly abused. Losing dogs are often doused in gasoline and burned or tied to weights and drowned.