Q: Ben is our 2-year-old indoor cat. We adopted him when he was 6 months old. We added a second cat three months ago. That was when Ben started overgrooming. He is now almost bald on his sides. Is he ...

Demodex mites are tiny eight-legged parasites that mostly live in hair follicles and oil glands on your face, neck, or chest. As alarming as this may sound, they’re generally harmless.