Short answer: dogs slow down with age, but you should not assume every change is just age. Tell your vet what you see.
What the AKC and ASPCA say
The AKC says different breeds and sizes age at different rates: large breeds are often considered seniors around 6 years old, while smaller breeds may not reach senior status until 7 to 10. The ASPCA says to report all changes to your vet and not to assume your dog is just getting old, because many changes can be helped. AAHA's senior care guidelines say vets should teach owners about the aging process and address misconceptions.
What to do
Book regular senior check-ups. See signs of aging and shorter walks.
Get the right help
Your vet can tell you what is normal for your dog.
This article is general education, not veterinary advice. If your dog seems unwell, is in pain, or something changed suddenly, call your vet. If it could be an emergency, do not wait.
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Sources
Sources & care notes
Frequently asked questions
When is a dog considered senior?
It varies by size. Large breeds are often considered senior around 6 years old, smaller breeds later, up to about 10.
Which changes are ordinary?
Slowing down and sleeping differently. What matters is whether a change is new, and what else travels with it.
Should I assume a change is just age?
No. Tell your vet what you see, because pain and illness can look like aging.
What does good senior care include?
Regular senior check-ups, and attention to movement, appetite and rest as they change.
