That explains why the burns were so severe and the recovery was so long. Our skin gets thinner as we age. My grandma is 92 and her skin is onion-peel thin. She lives with my mother who has two dogs. She has to be careful to always wear jeans around the dogs. If they jump up and scratch her leg, it shreds her skin. She heals very slowly and it takes months to heal. If she doesn't take antibiotics, it gets infected and it doubles the recovery.