What some experts say about PD and pets

Service dogs trained to work with people with Parkinson's can help their owners maintain balance while walking, or alert a family member after a fall.
Plus, owning any dog, service or not, automatically writes exercise into an owner's schedule.
In general, studies link pet ownership with reducing signs of depression in people with chronic illnesses and with reducing loneliness in the elderly.
M J Fox
https://www.michaeljfox.org/news/how-pets-help-people-parkinsons-disease
Parkinson.org
https://www.parkinson.org/blog/tips/service-dogs-for-PD
DPF
https://davisphinneyfoundation.org/helping-paw-for-parkinsons/
US Service Animals
https://usserviceanimals.org/blog/service-dog-for-parkinsons/