NOT BUSTED! But there is more to consider. . .
A cold, wet nose is one sign of good health in dogs and cats, however, even a healthy pet can have a warm, dry nose on occasion. On the other hand, really sick pets can also have cold, wet noses. Any one indicator of health is not 100 percent accurate all the time. Any pet experiencing pain or symptoms of illness such as lethargy or not eating should be seen by a veterinarian.
But why do dogs have cold, wet noses anyhow?
Dogs don’t sweat.
They cool down by opening their mouths wide and panting. Some scientists suggest that having cold, wet noses also plays into this cool-down equation. A little moisture on the nose keeps it cooler and therefore helps to cool a dog on hot days.
A dry nose might suggest that the dog is dehydrated, and a warm nose suggests the dog may be running a fever. If this condition persists for more than a day or two, you should head to your vet to have it checked out.
Another reason that dogs have cold, wet noses is because they’re quite fond of licking their noses. Many dogs have long tongues with which they can easily reach their nose; possibly enhancing coolness and transferring moisture to the nose.
After dogs have eaten, they often use their tongues to clean off their noses, particularly after a messy meal. This in turn leads to the cold, wet noses we’ve come to expect in dogs.
An alternate explanation as to why dogs have cold, wet noses may have to do with survival skills, and predate domestication of our furry friends. It’s suggested by some scientists that extra moisture on the nose may increase a dog’s sense of smell.
The tiny molecules that make up a scent can more easily stick to a damp surface. Working dogs especially need great “smelling” skills to herd, find pests, look for missing people, or sniff out illegal substances at airports.
Cold, wet noses may simply be better at smelling things than dry noses.