Cruella: I�m sorry to hear of this. Not too long ago, something similar happened to us when our Jack Russell was violently attacked by a Pit Bull (passing as a Staff). Thankfully, our local constabulary tends to act upon anything I contact them about. However, I think it�s more that they all know me rather than dedication.
Your police have a duty of service towards you. If you feel they have failed in that responsibility, it�s important that you actually go to the office to file a complaint. They do not want people to do this as it reflects badly on their performance stats and the local police chief gets adverse attention drawn.
This doesn�t address the immediacy of the fact their unleashed dog was aggressive. It could be a child next time and the consequences much more dire.
It may be worthwhile contacting your local MP to see when they conduct their local surgeries and schedule a meeting. Typically they�re limited to ten minutes. However, your MP DOES take note! Additionally, consider contacting your local Citizen�s Advice Bureau.
Finally, you may wish to consult with your vet to see if she knows anything about the animal who attacked your dog. There may already be a known history.
I realise this does not offer immediate satisfaction, but hopefully will help to guide you in the right direction.
You are in my thoughts
Fr Bill