I corrected myself from the hyperbole, but it wasn't their first response.
The first response was that they allowed, as GAF has cried out for officers to do in the past, the owner to restrain the animal despite it having attacked an officer.
When the shots were fired, the dog was attacking again with less than a second closing distance. It was a significant and immediate threat and didn't allow time for other means. Taser isnt anywhere near a guarantee, either in hitting the threat or neutralizing it before or even after it closed distance.
It's horrible the teen was killed, and the officer probably should still get heat even if it was the "right" option to draw and fire. And I'll argue again that the officers should have helped the teen restrain the dog and ensure that it was secured away from further possible interaction, as all the officers didn't have to accompany their co-worker to the street. But all these arguments for other options and such in that very moment where the dog came back into the picture ignore that very situation.