IT IS A COMMON MISCONCEPTION THAT "HEALTHY DOGS ALL HAVE WET NOSES". THIS IS USUALLY TRUE, BUT NOT ALWAYS.
SOME VERY HEALTHY DOGS HAVE DRY NOSES AND SOME SICK DOG'S NOSES ARE VERY WET. THE ONLY REASON A DOG'S NOSE IS WET IS BECAUSE HE LICKS IT. HEALTHY DOGS TEND TO BE MORE HEARTY AND WILL USUALLY LICK THEIR NOSES MORE OFTEN.