Here are some reasons why a German Shepherd (or any dog) might show fear of large objects:
* Past negative experiences: If a dog has had a bad experience with a large object, like being startled by a large truck or falling off a table, they may develop a fear of similar objects.
* Lack of socialization: Dogs that haven't been adequately socialized with different sights and sounds may be more prone to fear unfamiliar objects.
* Genetics: Some breeds may be more predisposed to fear than others. However, this doesn't mean all German Shepherds are afraid of large objects, just that some individuals may inherit a higher sensitivity to fear.
* Medical conditions: Certain medical conditions, like anxiety disorders or neurological issues, can cause fear and anxiety, including fear of large objects.
It's important to remember that each dog is an individual, and their behavior is influenced by a complex interplay of genetics, environment, and experiences. If you notice your German Shepherd is fearful of big objects, it's best to consult with a veterinarian or a certified animal behaviorist to understand the underlying cause and develop a plan for addressing the fear.