Corgi Dog Earrings in 925 Silver

The dog (Canis lupus familiaris) is a carnivorous mammal ascribed to the genus Canis (canidae family). With domestication he distinguished himself from his predecessor, the wolf, of which he represents a neotenic form (although there is still some divergence in this regard) and with respect to which he has less sharp canines, longer intestines, and is devoid of sharp claws .

The dog is extremely variable in its biological characteristics, due to the selection made by nature (from the areas of origin) and above all by man (his life partner since prehistoric times). The weight can vary from 700 g to 90 kg. It has a menstrual cycle repeated twice a year (unlike wolves that have only one period of estrus) and this characteristic is partly due to man to facilitate breeding and selection.

The sense of smell

The main distinctive feature of the dog is the sense of smell, derived from its prehistoric activity as a hunter. A fundamental part of his odor recognition process is the conformation of his nose (the nose) but above all the very rich internal mucosa, able to distinguish only one molecule of one substance out of millions. The nose in the dog represents the terminal end of the nose of the same. The imprint of the convolutions that distinguish it is specific to the individual and, like the fingerprints of the human being, can be used as an effective recognition system.

The mucous membrane that covers it performs the same tasks as in any other mammal: at its extremity there are the nostrils or cavities to suck the air and as in other mammals, at the mucosocutaneous border, it is equipped with lateral "vibrissae", large hairs with very important sensory functions. What makes it special are various additional functions. Meanwhile, it is an exceptional sense organ especially in a thermal, dynamic sense (because the mucous membrane that covers it is equipped with sweat glands - the dog's skin is almost totally devoid of them -) and tactile (it is able to record even very slight roughness and vibrations which would otherwise escape the animal). The dog's nose is a very sensitive nose, which is why they are trained and used to search for animals and people.

Evolutionarily, it was believed (starting from the studies of Konrad Lorenz) that the dog could descend from the wolf or the jackal, or both, which would have given rise to different primitive breeds, from which the many current forms would have derived.


Over time, man has selected many different breeds and varieties of dogs, to help him in his many activities: therefore there are today breeds of shepherd, hunting, guard, companion, racing and others.

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