If your dog has bad breath, he may need his teeth cleaned. The Boy Scouts, the Girl Scouts, and the 4-H Club all offer merit badges in dog care. Puppies need to chew to stimulate the loss of their baby teeth and to help place their permanent teeth. Dogs are pack animals by nature. They need closeness, touching, and petting to be content and happy.
Dogs are able to see much better in dim light than humans are.
This is due to the tapetum lucidum, a light-reflecting layer behind the retina. Because it functions like a mirror, it also accounts for the strange shine or glow in a dog's eyes at night.