Signs of Aging in Dogs: Normal Changes vs. When to Call the Vet
Every dog ages differently, but there are broad patterns owners can watch for across physical, sensory, and cognitive changes. Here's a plain guide to what's typically expected — and what deserves a veterinary visit.
Normal aging vs. a reason to call the vet
Physical
Often normal
- Graying around the muzzle and face
- Slightly stiffer getting up after resting
- Sleeping more overall
- Gradual decrease in stamina on walks
Call the vet
- Sudden lameness or reluctance to move at all
- Rapid weight loss or gain
- New lumps, or noticeable pain when touched
- Labored breathing or persistent coughing
Sensory
Often normal
- Slightly slower response to quiet sounds
- A little more hesitation in dim lighting
- Cloudier-looking eyes with normal vision
Call the vet
- Bumping into furniture or walls
- No response to loud sounds or their name
- Sudden vision changes or visibly cloudy, red, or painful eyes
Cognitive
Often normal
- Slightly less enthusiasm for new tricks
- Preferring familiar routines over novelty
- A bit more time needed to settle after excitement
Call the vet
- Disorientation in familiar spaces
- New house soiling or disrupted sleep-wake cycles
- New anxiety, confusion, or withdrawal from family
What to film and log each month
Gradual change is hard to notice in the moment but obvious when you compare footage side by side. Once a month, try capturing a few short clips of the same everyday activities:
- A short clip of your dog's gait on a flat surface
- Going up and down a few stairs, if part of your routine
- A minute of normal play or a favorite toy
- Their response when you call their name from another room
Dognition's Continuous Cognitive Monitoring is built around exactly this idea — starting from a baseline assessment and letting you upload short videos over time so change is easier to see, describe, and share with your veterinarian.
More on the aging mind
- Canine health: the whole-dog guide
How body, mind, and behavior fit together across a dog's life.
- Canine cognitive aging
Which abilities rise, which fade, and when — across 25,463 assessments.
- Dog dementia signs
Confusion, disrupted sleep or house soiling? The DISHAA categories explained.
- Sundowning in dogs
Night pacing and evening confusion in older dogs.
- Cognition by age: the data
The full age curves behind these pages.
Frequently asked questions
- At what age is a dog considered a senior?
- This varies by breed and size — smaller breeds often reach 'senior' later than large breeds. Your veterinarian can advise on what's typical for your dog's breed and size.
- Is it normal for an older dog to sleep more?
- Yes, increased sleep is common with age. It becomes worth a vet visit when it's paired with disorientation, appetite changes, or a sudden, dramatic shift in energy.
- My dog's eyes look cloudy — is that a problem?
- A mild haze (often lenticular sclerosis) is a common, usually harmless part of aging. Cloudiness paired with redness, pain, or vision loss should be checked by a veterinarian.
- How is normal aging different from cognitive decline?
- Normal aging tends to be a gradual slowing down without confusion or a breakdown in familiar behavior. Disorientation, new house soiling, or disrupted sleep can point toward canine cognitive dysfunction — see our guide on dog dementia signs.
- Why should I film my dog every month?
- Gradual change is easy to miss day to day but clear when you compare footage months apart. A running video log gives you and your veterinarian something concrete to compare, rather than relying on memory alone.