A gun is riduclus as there are stories out there when cops just shoot dogs that pose no threat so not ALL cops have common sense when to pull the trigger. But some do have have the proper knowledge so that subjest is 1/2 & 1/2, equal I guess. If it was a legal gun even for non-cops than I think it is completley allright that he did what he did.
I do not mean to be rude or cause chaos here but golly geese you just let your dogs (that you can not control obviously) loose on the poor guy & his little dog. I have seen & heard of many "friendly" dogs attacking other people & dogs. And vice versa, what if he had a large dog that was not friendly or his small dog was mean & your dogs just put up with all the little dogs biting then your dogs would have wounds. Dogs are never 100% predictable. What if the man had treats in pocket that your dog could smell that could cause a bad confitation.
I know I would be totally ticked off to no limit if someone just let there dogs loose & they ran up on me like that. I love dogs w/ my all & it would not matter if I was walking alone or w/ 1,2 or all 3 of my dogs I would still be very upset. It may be different if they wiggled out of their collars or some other accidental way they became loose but on purpose?
Most places have leash laws & they are there for a puprose!
I persoanlly think he had every right to call animal control.
I also strongly agree that you should walk the dogs seperatly until they & you are trained to handle eachother properly. Maybe obedience clasases.