Yes...... And.....

For starters, the article link originally posted was clearly written by someone spinning the story. Perhaps a blog of sorts. The article I posted was a news source and tended to be more balanced. In other words, an attempt to report the story rather than create opinion.
Being at the wrong address could have not been the officers fault, it might have been but we don't know based on the article. 911 call takers can make mistakes, dispatchers can make mistakes, the original caller could have made a mistake so we don't know. They thought they were at the right address investigating domestic disturbance. Nothing to get too upset about there.
The video..no sound. The owner says the first officer petted the dog. He may have, but I didn't see that for certain. I watched the interaction between the dog and the 1st officer 4 times. He could have briefly petted him, he could have held his hand out for the dog to smell him or he could have been reaching for a pen, notepad etc and it only appears like it from the camera angle. Nothing to get upset about there anyway.
The dog then approaches the officer. Owner says and I'm paraphrasing "He just went over to say "Hi" and was wanting to lick the officers face and the officer panicked, and shot my dog"
What I see is the dog lunging up at the officer 2-3 times while the officer is backing away. Without sound it's hard to tell what is happening. The officer may be panicking and shouting while the dog is playfully yelping, or the dog could have been suspicious of the first officer, when he went towards the 2nd officer he became aggressive, growling and snapping at the officer.
Tragic? Absolutley. Wrong address, guy loves his dog.
But based on the available information, I'm willing to wait and see before I start labeling the officers rabid dog killers. If the evidence indicates the cop shot a frolicking dog who just wanted to play then by all means, hang him from the closest tree.