When you see a disturbing image that appears to be animal abuse:
1. Download the images immediately, and collect all the details you can about the account that posted the image - the poster's account name, the full text posted with the images and any comments posted with the images. Because image files contain important data, only use screenshots if you can't download the images.
2. DO NOT demand that the site take the images down. "Most people not affiliated with law enforcement are shocked to learn that leaving such offensive content up is the right move in the short term," ALDF's Scott Heiser told The Dodo. But law enforcement will need to see the images for evidence, so keeping quiet in the short term will help in the long run.
3. Similarly, DO NOT comment on the image or on the poster's account, or share the posting. This could tip them off that you are planning to report them to law enforcement, and you don't want to do anything that might compromise the investigation. For example, after veterinarian Kristen Lindsey posted a photo and bragged on Facebook about killing a cat named Tiger with a bow and arrow, there was such backlash that she canceled her account. This hurt the case in the long run, since police had a hard time gathering evidence.