Would a German Shepherd get cold in a car at 23 degrees?

My son goes everywere with his German Shepherd. He left his dog in the car for several hours. Was sited for cruilty to animals because the dog was "

My son goes everywere with his German Shepherd. He left his dog in the car for several hours. Was sited for cruilty to animals because the dog was "whining, shaking and unprotected..." This is a full grown shepherd.

or:My son goes everywere with his German Shepherd. He left his dog in the car for several hours. Was sited for cruilty to animals because the dog was \"whining, shaking and unprotected...\" This is a full grown shepherd.

or:should be fine in below freezing temperatures, see http://www.petplace.com/dogs/top-dogs-for-cold-climates/page1.aspx

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