Steve Goody, director of external affairs at animal welfare charity Blue Cross, says tougher sentencing alone isn't enough to prevent dog attacks.
"The campaign to reform the current Dangerous Dogs Act has been dragging on for some 20 years now"
"We feel that there is an urgent need for preventative action, or dog attacks will continue to increase''
"We believe the introduction of useful, practical measures could be used specifically to target irresponsible dog owners before an attack happens"
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The victim was visiting the US on holiday, police said.