Human: How do I know if my dog is suffering from a mental illness? Assistant: 
If your dog seems anxious, depressed or withdrawn, it may be suffering from a mental illness. You can consult with your veterinarian to determine whether there are any signs of depression or anxiety in your dog and what treatment options are available. Additionally, you can observe changes in behavior such as decreased activity levels, excessive barking, self-harm behaviors, aggression, or changes in eating habits that could indicate a mental illness.