Q524: What happens if my pet dog bites an intruder in my house?
It is an offence for a dog to be dangerously out of control in any place, including private property.
All the circumstances will be considered and each decision will be judged individually. For example, if you deliberately set your dog onto the intruder and they suffer injury, you may be liable for prosecution and the dog ordered to be kept under control.
However, if you are not at home and your dog attacks an intruder, it is unlikely that you would be liable for the attack. This defence only applies in your home and not other premises or land i.e. if a person (intruder of otherwise) enters your garden and is bitten by your dog, you may be liable.
Q653 provides more information on dangerous dogs.