That doesn't bring up gifsIf you would like to see all GIFs and images that have been posted on BackyardChickens.com, you can try using the search term "media" or "photos." This should bring up all posts that contain either of those terms, and often, it is standard practice for users to post photos or GIFs along with their text posts.
You can also use the "Media" link in the top navigation bar of the forum to browse all media items, including photos and GIFs, that have been posted on the forum. This will allow you to easily browse through media items that have been posted without needing to sort through text posts.