I'm suddenly reminded of what happened to two of the puppies I was raising (one of which, sadly, became a casualty, as will be explained in a bit.)
There was this large dog (I believe it was a pit bull dog) that was owned by an MHMR patient from across the alleyway that kept getting into our backyard by jumping over the fence. The first time this happened, we simply warned the owner that we Would call Animal Control Services if she doesn't control her dog. The second time it entered our backyard, it was on a leash (of sorts. Really, it was a really long nylon rope). My mother-in-law went out there to try to scare the dog away, but the puppies were following really close behind her, and the dog suddenly attacked one of the puppies. The mother-in-law quickly grabbed the rope, yanked the dog back (thankfully, there was a table between her and the intruder, so she didn't get attacked as well), and the puppy that was attacked immediately made a sprint into the house and underneath the couch.
While I was dragging her out, patching her up, and keeping her awake (she had 1 deep wound and was in severe shock), my husband and my mother-in-law were contacting the ACS. However, the dog's owner had put her inside and hid her from them when they arrived. That, for me, was very aggravating.
There was relative peace for 2 weeks after that incident, then the dog attacked again. That time, the owner was present (she was walking it, apparently), it was morning, and we were asleep. However, the puppies were barking like mad (which woke me up, and I vaguely took as a warning sign, but was too tired to get up even though I should have) and the mother-in-law went to investigate. When she looked out there, the smallest of the puppies was in that monster's maw, still struggling against it. She then grabbed the BB gun (which was ready to fire), and shot at it. The entire time that this happened, the pup died, and the monster's owner was *softly* screaming "could you please help me get my dog?". When my mother-in-law fired the BB gun, it made a noise so loud that it sounded like an actual gun blast, and because of that, the law was called, and the woman immediately started screaming "Oh no! My poor dog!".
As you can imagine, that last line damn near threw all of us into a fit of rage. I mean, come on! "My poor dog!"? What about my poor puppy, who I had taught to sit on command the previous night, that's now lying dead in our backyard!? We had raised her since she was born, and that's time that we're never going to get back, thanks to that woman's incompetence, her inability to keep her monster under control! >=(
Once again, the ACS was called, and the owner tried to chase her dog away so as to save it (which was in vain, as they found it inside of her home.) The law was there, as well, but they weren't interested in the dog, rather the gunshot that the neighborhood heard (kind of surprised me that it made that loud of a noise as well.) There would've been a hearing on the 30th of this month, but the dog had to be put down anyways because it fell ill while at the pound. I've pretty much gotten over the death of the pup, but if I see that woman again, I don't think I'll be able to keep myself under control and fly into a rage, just to make sure that she remember's exactly what her incompetence brought onto not just my family, but our neighborhood as well.
Now, to get to the topic at hand: If an officer had shot any of the remaining puppies simply because s/he feared for his/her life/well being, we would have been just as upset, maybe a bit more as s/he is generally seen as a fully competent and capable person, and would have a nice, long discussion with the police department and, if at all possible, filed a law suit.