Petco Text Logo
Petco Pet Logo

Why is my senior dog showing aggression, anxiety, and personality changes?

Updated On September 23rd, 2025

Pet's info: Dog | Labrador Retriever | Male | unneutered | 9 years and 11 months old | 75 lbs

Mr Wilson has been having some gradual personality changes over the past few years, the most noteworthy of which include hours long panic attacks where he has wrecked dog crates in his attempt to bury himself under things that can potentially injure him. When I try to reassure him, he can sometimes become verbally aggressive, occasionally even trying to snap at me. I have had him checked by a vet. He hasn't displayed symptoms with them and his lab work is inconclusive. What could be wrong?

1 Answer

Most Helpful Answer

Image profile

Answered By Angel Alvarado, LVT

Licensed Veterinary Technician

Published on March 18th, 2019

He may be developing a degree of canine cognitive dysfunction (senility). Yiu can discuss this with your veterinarian if medical causes ( illness or injury) have already been ruled out. A veterinary behavioral specialist may help you identify Mr. Wilson's triggers and then recommend exercises to reduce or eliminate them. Your veterinarian may be able to dispense medication that can also help. You can read more below. https://www.petcoach.co/article/cognitive-dysfunction-senility-in-dogs/

Vote icon

1Pet Parents found this answer helpful

image
Have A Vet Question?

Book an appointment with the pros – our expert vets are here to help.

Sponsored