The Spokane County prosecutor's office is reviewing a graphic video forwarded by a national animal rights organization showing 10 hogs being killed during a bullet-testing demonstration. People for the Ethical Treatment of Animals, an advocacy group known as PETA, claims the video, now on the organization's Web site, shows "cruel treatment of 10 pigs, resulting in the pain, suffering and deaths of the animals, in complete disregard of Washington law, for the sole purpose of commercial gain."