Saasher...I don't think it is against the law to allow an out of control dog to attack other dogs. Three years ago my husband was walking my sister's little Jack Russell dog Stanley, and he was attacked by a large cross breed dog. My husband had to wrestle this dog to the ground to get Stanley out of it's jaws. To cut a long story short, the large dog bit Stanley and his bowel was pierced and he died later of loss of blood after undergoing an emergency operation. My sister went to the police, the RSPCA, local dog wardens...you name them, she went to them, but not one of them wanted to know. Because the dog did not bite my husband they could not prosecute, even though it killed Stanley. The owner of the dog got off scot free, and her dog still lives and could do the same thing again. My sister was heartbroken over the loss of Stanley (and the £1000 it cost in vets fees) and my husband was on sleeping tablets for months because he kept reliving how he had to wrestle the dog to get Stanly off him. So it seems it is not against the law if a dog hurts another animal, only if it hurts a human.