 Call us, 707-442-5744. Email sales at EurekaRadio.com. Hi, I'm Warren Eckstein with the Pet Show Tip of the Day. The senior dog. You know, many similarities exist between the aging process in humans and the aging process in dogs. For instance, a sign of aging common in both is the graying of the hair around the head. In dogs, it's particularly apparent around the muzzle and the ears.