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Beagles are known for their distinctive whitetails, but their tails tell more stories than people generally know. The purpose of the whitetail is actually practical. Back in the days when they were used more for hunting, the whitetails helped the dogs become more visible to people when the Beagles had their noses in the ground while sniffing away during a hunt. Supposedly, breeders bred the white-tip tails into Beagles for this very reason. A Beagle’s tail is also an indication of whether the dog is a purebred or not. All Beagles will have some white hairs on their tails. But the concentration of hair will point to the purebred dogs. Purebred Beagles will have completely white-tipped tails.