From Reason.

Police entered a back yard in Mobile, Alabama, encountered a dog, and shot it. A Tehachapi, California, officer saw a dog run toward him while he was performing routine code enforcement checks. “He just pulled out his gun and boom, boom, boom,” reported a witness. An officer responding to a complaint about a moving van in the street in Columbus, Ohio, shot a dog nine times after it growled at him. And in Filer, Idaho, an officer shot a dog whose owner was throwing his 9-year-old son a birthday party. You can watch the dash-cam video (warning: strong content and language) by Googling “officer shoots dog at boy’s birthday party.”

What is interesting to be is that you never hear about police shooting cats.