Senior dogs
How can I tell my dog is aging besides gray hair?
Last updated 23 September 2026 · How we write and check this
Short answer
Graying around the muzzle is only the most visible sign. Watch for slower rising from the floor, shorter enthusiasm on walks, more sleeping during the day, a change in how your dog takes stairs, and a slightly cloudy look to the eyes. Most owners notice three or four of these gradually over 6 to 12 months rather than all at once, often only realizing the full pattern once several signs have appeared together.
Movement changes come first for many dogs
A dog that used to leap onto the sofa in one motion might start pausing, gathering itself, or taking a run-up. Stairs may be taken one at a time instead of two at once. These small hesitations are often the earliest reliable sign, appearing months before anything else is obvious.
Less visible but just as telling
A mild cloudiness in the lens of the eye, called lenticular sclerosis, is extremely common after age 8 and is a normal aging change rather than a disease, though it is still worth a vet confirming that at a check-up. Sleep also tends to increase, often to 16 or 18 hours a day, up from the 12 to 14 hours typical of a healthy adult.
Behavioral shifts worth noting
Some dogs become quieter and less reactive to noise as hearing softens, while others become more clingy, following owners room to room in a way they never used to. Neither is automatically a problem, but writing down when a change started helps a vet separate normal aging from something worth investigating further.
Nails can also offer a clue, since a less active dog naturally wears them down less on pavement, so nails that click loudly on the floor for the first time in years often mean walking distance has quietly dropped, not just that trimming is overdue.
Key takeaways
- Slower rising and hesitant stair use are often the earliest visible signs of aging.
- A cloudy blue-gray tint to the eyes after age 8 is usually a normal change, not a disease.
- Healthy senior dogs often sleep 16 to 18 hours a day, up from 12 to 14 as adults.
- Track when changes started so your vet can tell normal aging apart from a health issue.