But most martial arts have real world applications though, though ground fighting is something that should be avoided as much as possible, because asphalt + possibly glass shards is not a good combo for your health.
Why do dogs sniff? Dogs sniff to identify, for the majority of cases it is to sniff whether or not there is danger. A dogs sense of smell is much greater than that of a human being and it can smell things from a further away distance than many other animals as well as humans.
A dog's nose should normally be wet and cold to the touch. If it's hot, it means that the dog is probably running a fever of some type. I'd take the pooch to a vet as soon as possible if it doesn't clear up within a day or so. It could be an indication of something serious.