Shaving a dog. Does this make them cooler in the summer?
In short: no
As we all know the average body temperature of a dog is about 38.5 C from 38 C to 39.2 C to be exact. We also know from rigorous scientific studies that in full sun the ends of the hair can quickly reach 66 ° C, a temperature that is deadly to a dog's body. But we don't know much about the conductivity of hair. How can we determine the conductivity and what factors does it depend on Helps the hair regulate body temperature only at cold temperatures Or also helps regulate regulation at hot temperatureseguleren?
Basically 4 factors play a role in hair conduction:
1. The distance between the end point and the root of the hair. This is calculated by subtracting the temperature at the end of the hair against the temperature of the skin and dividing by the length in centimeters of the hair. The shorter the hair, the faster the heat reaches the skin and vice versa. For this calculation we use Newton's Cooling Act:
(Ta minus Ts C F x -----------------
C is conductivity, F is a constant factor, Ta is the temperature of the end of the hair and Ts is the temperature of the skin. As an example we take skin temperature 38.5 C, which is the average body temperature and 66 C as the temperature at the end of the hair, which corresponds to a temperature on a warm sunny day. In the first example we use a coat length of 8cm and in the second example a coat length of 2cm.m.
C F 66-38.5 / 8 3.443,44
C F 66-38.5 / 2 13.753,75
In this simple example, we can see that a change in coat length by 6 cm multiplies by 4 its conductivity.
2. F is a constant factor that also depends on the color of the coat; Dark colors absorb heat better than light colors, which means that if we put 2 examples of the same variety; A white and a black under the sun will hit the black example much more difficult than the white example. In nature, the dark-colored animals have a crepuscular nature.
3. F is also a constant factor that depends on the genetic makeup of the dog's breed, the porous coat of a Spanish Water Dog or a Poodle can withstand the heat much better than a silky coat such as the Yorkshire Terrier or Maltese. .
4. Coat maintenance also plays a role, because a coat full of tangles also increases body temperature. A coat that is wet also increases thermal conductivity, our dog can play in rivers and water bodies, but then we should not get wet for long in the sun. We should also never submerge an overheated dog in cold water.
Shaving our dogs also increases their risk of skin cancer or other skin disorders.
Hair Length and Temperature Tolerance - Robert Jay Russell, Ph.D.