DOW told me when we had one of our dogs off leash this: A dog off leash in the state, national parks or forest are considered wild and will be shot. Check with them and get a name, date and time to CYA.
As for cats they are considered "wild" or "feral" since they are not leashed animals and cannot be disposed of through means other than trapping.
Now a dog of any stature that appears to be menacing children or other humans would be considered wild and dealt with as seen fit at the time of contact. YMMV