When dogs sniff each other's butts, they aren’t just huffing stale fart fumes, but “speaking with chemicals,” as the American Chemical Society puts it. Much dog-to-dog communication is done through smell. It may seem like a strange way to go about it, but butt sniffing is just the.
Chemicals from special glands on a dog's rear end tell other dogs a lot about them.
Dogs are of course renowned for having a superior sense of smell, so it is for dog owners that their dogs often like to greet other dogs by sniffing their bottoms, .