Dogs can be nervous for a variety of reasons. Some dogs are simply more high-strung than others, and this may be due to a variety of genetic factors. Other dogs can develop nervous disorders due to traumatic or stressful events in their lives. Dogs can also be nervous if they aren't getting the right amount of exercise or mental stimulation.
Nervous dogs are easy to spot. They are dogs that are restless in excess, are destructive, sleep poorly and can be aggressive. It is important to know how to identify this problem in order to treat it since it can decrease your quality of life.
Dogs that are too nervous are normal to suffer from stress derived from genetic, environmental or educational factors. Each dog has a different personality that makes it unique. Some are playful, some are calm, some are shy, and some are high-strung.
Sometimes, the owners reinforce the nervousness of their dogs unconsciously. An example in this sense: if we come home and the dog greets us with jumps and we caress it and pay attention, we reaffirm the fact that it is out of control.