there isn't a specific disorder listed in the DSM-5 (Diagnostic and Statistical Manual of Mental Disorders, 5th edition) that describes the belief that pets or animals are watching someone and may be humans in disguise. However, there are certain psychological conditions where individuals might experience delusions or hallucinations that could lead to such beliefs.
Delusional Disorder: Delusional disorder is a mental illness characterized by the presence of one or more delusions lasting for at least one month. Delusions are false beliefs that are not based in reality but are firmly held despite evidence to the contrary. An individual with delusional disorder may have unusual and fixed beliefs about various things, including animals or pets watching them or being disguised humans.
Schizophrenia: Schizophrenia is a severe mental disorder that can cause a range of symptoms, including hallucinations and delusions. People with schizophrenia may experience auditory, visual, or tactile hallucinations, and these hallucinations might lead them to believe that animals or pets are observing them and might be humans in disguise.
It's important to note that such beliefs can vary greatly depending on the individual and the specific nature of their mental health condition. If someone is experiencing such beliefs or symptoms, it is crucial for them to seek professional help from a qualified mental health professional for proper evaluation and treatment.
Please keep in mind that mental health research is continually evolving, and new information may have emerged . If you have concerns about someone's mental health or your own, it's always best to consult a healthcare professional for the most up-to-date and accurate information.