Senior dogs
How do I know if my large breed dog is already a senior?
Last updated 23 September 2026 · How we write and check this
Short answer
A large breed weighing 25 to 45 kg is usually considered senior between 6 and 8 years old, earlier than most owners assume. Signs include slower rising from lying down, a grayer muzzle, less enthusiasm for the first ten minutes of a walk, and needing more recovery time after exercise than it did a year or two earlier. If your dog fits that weight range and shows two or more of these, it is worth an honest conversation with your vet.
Weight range is the starting point
Breeds such as Labradors, Golden Retrievers, and German Shepherds typically fall into the large category, and their bodies begin showing wear well before the ten year mark that smaller dogs reach comfortably. A 32 kg Labrador at 7 years old is doing more physical work per day, relative to its skeleton, than a 6 kg terrier at the same age.
Everyday signs to watch for
Look for stiffness after a nap, hesitation before jumping into the car, a change in how eagerly your dog greets you, or sleeping noticeably more than a year ago. None of these on their own confirms anything, but a cluster of two or three changes over a few months is a reasonable prompt to start treating your dog as a senior in how you feed, exercise, and set up the home.
Talking to your vet
Bring a simple list of what you have noticed and roughly when it started. Vets find specific timelines more useful than a general sense that a dog seems slower, and it helps them decide whether routine senior bloodwork makes sense at your next visit.
It also helps to compare notes against photos or videos from a year earlier. Owners who watch their dog every day often miss gradual change, while a short clip of your Labrador bounding up the stairs last summer next to how it climbs them now can make the shift obvious in seconds.
Key takeaways
- Large breeds (25 to 45 kg) often reach senior status at 6 to 8 years, years before small dogs.
- Slower rising, a grayer muzzle, and shorter walk enthusiasm are common early signs.
- A cluster of changes over a few months matters more than any single symptom.
- Keep a simple timeline of changes to share with your vet.