The skin and hair protects from physical and microbial damage to dogs the skin and hair provides insulation from the harsh weather conditions. The colour of skin and hair is changed due to melanin pigment, the pigmentation does not allow the ultra violet rays of sun to harm body . The skin also act as a sensory organ, as millions of nerve endings are located on the surface of skin. Skin also has the property of developing resistance to repeated infection due to infection, immunity. At pressure points like elbows skin becomes thick for giving extra protection.
The colour and the length of hair gives varying degree of insulation and protection from the ultra violet part of sun light .The black coloured dogs with thick coat are more protective than the white, light coloured dogs with thin skin hair coat. The hair coat of the dogs differs from breed to breed , a German Shepherd has double coat, it has a under coat of fin short hair and the thick long coat. The under coat is like the sweater we put on in the winter months. The long coat serves as the coat over sweater a cover all. The double coated dogs have their origin in temperate regions, cold to very cold regions. The dogs with their origin in tropics, Boxer, have short coats and are less protected for insulation. the density of hair also vary , from 100 to 500 hair per square centimetre, to insulate the body.
The hair grow from the hair follicles and its growth is cyclic, there is a growth phase (anagen phase), resting phase (catagen phase) and the shedding phase (telogen phase) The hair shedding phase depend on the temperature ,nutrition ,stress disease and day length. The day length seems to affect the most, the cyclic phases The britches prior to exhibiting season, heat , also shed hairs.
The dogs don’t sweat like horse and human, eatsall over body, it sweats in foot pad only. So they do not need daily bath. In winters a bath in a month is sufficient to keep dog clean. However, in summers the story is different, dogs feel hot so frequent baths are needed when it is hot, above 35 degree centigrade. The use of shampoo is not harmful to dogs, provided it is used in mild form. In summers he dogs has fleas, so a bath with Medicare shampoo, readily available, is good for fleas removal.
So the skin and coat care of dg overlaps the human body care, but is definitely differs with breed season and environmental temperature, and the European and American literature be follow with caution.