Smell

Scent is a primary way dogs investigate the world. It supports tracking, recognition, environmental assessment and communication. German Shepherd working roles frequently use scenting ability, persistence and cooperation. Sniffing is valuable activity, not wasted walking time, and scent work can provide controlled mental exercise and confidence.

Hearing

Dogs can detect frequencies and environmental sounds people may miss. Barking at an apparently empty space may still have an environmental cause. Sound sensitivity can reflect learning, fear, pain, ageing or medical change; sudden noise sensitivity warrants consideration of health as well as behaviour.

Vision

Canine colour perception differs from human vision. Movement can be particularly salient. Low-light performance differs from human sight. Visual decline can alter confidence and behaviour.

Touch and bodily awareness

Enjoying affection does not mean enjoying restraint. Handling tolerance must be taught. Feet, mouth, ears, tail and rear-end handling matter for healthcare. Dogs should be allowed to pause where safely possible, and cooperative handling can make veterinary and grooming care safer.