Anxiety might also be cause by various medical reasons as well. For example, there is a certain type of age-related anxiety that can be developed in dogs that have cognitive dysfunction syndrome (CDS). In this type of situation, dogs will have difficulty learning; their awareness will start to fall or decline. Because of this, your dog may feel confused, leading to a form of anxiety.
The sudden behavior change may also be because of the following medical reasons as well:
- Autoimmune disorders
- Loss of hearing and vision
If your notice any sudden change in behavior for your pet dog, then it is important to pay a visit to your veterinarian in order to have their condition checked.