It is a simple natural response to keep themselves warm.
Dogs grow thicker winter coats to keep warmer in winter. The signal for dogs to grow their winter coats is the length of daylight each day; as it declines, the dog's body reacts by growing a thicker coat.
they grow a thicker coat during the winter because its so cold then loss it in the summer so they don't over heat
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Grow thicker coats, store food for winter, and put on pounds of fat.
The actuall patern would not change, but in winter it would have a thick coat, autumn losing the coat, summer normal coat (thin), spring, begining to grow the thicker coat again.
In Summer Time They Malt So They Can Be Cooler And In Winter Time Their Coats Grow Thicker To Keep Them Warm
Animals that stay active during the winter days grow a winter coat, which is thicker fur then they have during the warmer seasons.
It is not that it is thicker it is more denser The annular rings of the tree in the summer grow closer together because their is less rain. In the winter the rain swells the new rings; making them thicker to look at.
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Thicker hair is needed as a protection against the extreme cold of winter. The thick coat is shed in summer as the weather can be very warm.
Shaving does not "make your hair grow back thicker".
No, they do not grow back thicker. There is a bit of a fallacy regarding this, but it has to do with the hair loosing the normal taper and being cut off square at the end, so it may appear thicker, but the thickness of the hair does not change.