face, inguinal, and peripheral areas. There are specific glands in these areas that produce different odors, such as glands at the corner of the mouth, in the ear pinnae, the preputial and vaginal glands, and anal glands. Dog's gain social information by sniffing particular odors secreted from these areas. Dogs can also gain information from anal secretions. All canines have two symmetric sacs on either side of the anal sphincter that produce anal secretions during defecation. These are important in marking territory and sending information about social status. See also Wolf communication Body language of dogs Tail wagging by dogs References External links Pet Behavior articles from the ASPCA Communicating with your dog Animal communication Communication