Here is a statement from the AKC website that you can alter to fit your letter:
The American Kennel Club supports reasonable, enforceable, non-discriminatory laws to govern the ownership of
dogs. The AKC believes that dog owners should be responsible for their dogs. We support laws that:
Establish a fair process by which specific dogs are identified as "dangerous" based on stated, measurable actions
Impose appropriate penalties on irresponsible owners
Establish a well-defined method for dealing with dogs proven to be dangerous
We believe that, if necessary, dogs proven to be "dangerous" may need to be humanely destroyed.
The American Kennel Club strongly opposes any legislation that determines a dog to be "dangerous" based
on specific breeds or phenotypic classes of dogs.
AKC Statement
