Dog noses are fascinating little structures. Not only do dogs use their noses for breathing, dog noses also drain excessive tears from the eyes through tear ducts. In addition, they have sweat glands, which help to cool the body through sweating.Dog noses are also involved in collecting information about the environment. They do this through sniffing, but not all of the “information” is carried through the nasal passage. When a dog licks her nose, she transfers all sorts of scents to specialized scent detection olfactory glands located on the roof the mouth. This allows the dog to process her environment.For a case of chronically dry nose, your dog may benefit from a prescription lotion specifically designed to hydrate and nourish the skin on the nose. Because dogs are nose lickers, whatever lotion is used must be safe for ingestion. Most skin lotions that are sold over the counter are not safe for ingestion. It's better to listen to your vet's advice.