The present invention teaches a system for hydrating a dog during a walk or a jog, including a hand-held rehydrating liquid reservoir, a tube for feeding the rehydrating liquid to a dog collar, and a dog collar that presents the rehydrating liquid in proximity of a dog's mouth. The liquid transport arm may be one quarter or one half elliptical in shape. The liquid transport arm may include mouthpiece which may be a flavored treat, wherein the flavored treat may include holes allowing the rehydrating liquid to pass therethrough for presentment to the dog's mouth.