It’s Not Always Just Age: Warning Signs of Health Problems in Dogs

Image: Magnific

Changes in a dog's behavior are sometimes dismissed as “just getting older” or a quirky habit. But persistent changes in appetite, mobility, sleep, bathroom habits, breathing, or behavior can sometimes signal an underlying health problem.

Dogs naturally change as they age. Older dogs may sleep more, move more slowly and become less interested in activities they once enjoyed.

However, not every change should be attributed to aging.

A new or persistent change in a dog's behavior, physical condition or daily routine can sometimes be an early indication of pain, illness or another health problem. Recognizing these warning signs can help owners seek veterinary care sooner.

Why Changes in Older Dogs Deserve Attention

Aging itself is not a disease.

Senior dogs can develop age-related changes, but many medical conditions become more common as dogs get older. Arthritis, dental disease, kidney problems, heart disease, diabetes, vision or hearing changes, cancer and cognitive dysfunction are among the conditions that may affect senior pets.

The challenge is that dogs cannot explain when something hurts.

Instead, they may communicate through subtle changes in behavior.

A dog that suddenly stops climbing stairs, becomes less social, sleeps differently or has accidents indoors may not simply be “getting old.”

Those changes deserve attention.

1. Sudden Changes in Appetite

A dog's appetite can vary occasionally, but a persistent or significant change deserves veterinary attention.

Warning signs can include:

• Suddenly refusing food
• Eating substantially less than usual
• Becoming unusually hungry
• Difficulty chewing
• Dropping food from the mouth
• Drinking significantly more water
• Weight loss despite eating normally

Dental disease, gastrointestinal problems, metabolic disorders and other medical conditions can affect appetite.

If a dog refuses food, particularly when accompanied by vomiting, diarrhea, lethargy or other symptoms, contacting a veterinarian is appropriate.

2. Drinking Much More Water

Increased thirst can be easy to overlook.

Owners may simply assume that their dog was more active or that the weather was warmer.

But persistent excessive drinking and urination can sometimes accompany conditions such as kidney disease, diabetes or hormonal disorders.

A noticeable change in water consumption should therefore be discussed with a veterinarian, particularly if it continues.

3. Difficulty Getting Up or Climbing Stairs

A dog that starts struggling to stand up, jump onto furniture or climb stairs may be experiencing pain.

Arthritis and other musculoskeletal conditions become increasingly common with age.

Some dogs compensate for pain so well that owners may not immediately recognize it.

Possible signs of discomfort include:

• Stiffness after resting
• Limping
• Reluctance to climb stairs
• Difficulty getting into a car
• Avoiding jumping
• Walking more slowly
• Sleeping more than usual
• Becoming less interested in playing

Instead of assuming the dog is simply “slowing down,” owners should have persistent mobility changes evaluated.

4. Changes in Sleep Patterns

Older dogs often sleep more than younger dogs.

However, a major change in sleep patterns can sometimes indicate a problem.

Some dogs may begin sleeping during the day and wandering or becoming restless at night.

In senior dogs, these changes can sometimes occur with canine cognitive dysfunction, a condition that can affect memory, learning and awareness.

Other medical problems can also interfere with sleep.

A veterinarian can help determine whether the change is behavioral, medical or related to normal aging.

5. Getting Lost or Appearing Confused

A dog that suddenly seems confused in a familiar environment may need veterinary evaluation.

Possible warning signs include:

• Getting stuck behind furniture
• Staring at walls
• Appearing lost in familiar rooms
• Forgetting familiar routines
• Having difficulty finding food or water
• Becoming unusually anxious
• Wandering without an obvious purpose
• Changing interaction with family members

Cognitive dysfunction is one possible explanation in older dogs, but neurological, sensory and other medical conditions can produce similar signs.

6. New Bathroom Accidents

A previously house-trained dog that suddenly begins urinating or defecating indoors should not automatically be considered “disobedient.”

New accidents can have medical or behavioral causes.

Possible explanations include urinary problems, kidney disease, diabetes, gastrointestinal disorders, mobility limitations or cognitive changes.

Older dogs may also have difficulty reaching the door quickly enough if they are experiencing pain or reduced mobility.

A sudden change in bathroom habits deserves attention.

7. Persistent Coughing

Occasional coughing can happen for many reasons, but persistent or worsening coughing should not be ignored.

Coughing can be associated with respiratory problems, heart disease, infections and other conditions.

Owners should pay particular attention if coughing is accompanied by:

• Difficulty breathing
• Rapid breathing
• Weakness
• Collapse
• Reduced exercise tolerance
• Blue, gray or pale gums

Breathing difficulties can become an emergency.

8. Changes in Breathing

A dog's breathing pattern can change after exercise, excitement or exposure to heat.

But difficulty breathing while resting is different.

Signs that warrant urgent veterinary attention can include:

• Labored breathing
• Significant difficulty catching breath
• Open-mouth breathing unrelated to heat or exercise
• Blue or gray gums
• Collapse
• Severe weakness

If a dog appears to be struggling to breathe, owners should seek emergency veterinary care rather than waiting to see whether the problem resolves on its own.

9. Bad Breath Shouldn't Always Be Dismissed

Bad breath is common in dogs, but persistent strong odor can be a sign of dental disease.

Plaque and tartar can contribute to inflammation and periodontal disease.

Signs of possible dental problems include:

• Bad breath
• Red or swollen gums
• Difficulty chewing
• Dropping food
• Excessive drooling
• Pawing at the mouth
• Loose teeth
• Reduced appetite

Dental disease is common in dogs and can cause significant discomfort.

Regular veterinary dental assessments can help identify problems before they become more advanced.

10. Sudden Weight Loss or Weight Gain

Unexplained changes in body weight deserve attention.

Weight loss can occur because of inadequate calorie intake, dental problems, gastrointestinal disease, metabolic disorders or other medical conditions.

Weight gain can also be associated with changes in diet, reduced activity or certain medical conditions.

Rather than relying only on appearance, owners can regularly monitor their dog's weight and discuss significant changes with their veterinarian.

11. A New Lump or Skin Change

Many lumps found on dogs are benign, but it is impossible to determine the nature of a mass simply by looking at it.

Owners should monitor new or changing lumps, particularly those that:

• Grow rapidly
• Change shape
• Bleed
• Become painful
• Develop an open wound
• Change color
• Cause persistent irritation

A veterinarian may recommend diagnostic testing to determine what a mass represents.

12. Changes in Behavior

Behavioral changes are among the easiest symptoms to dismiss.

A normally friendly dog that becomes withdrawn, irritable or unusually aggressive may be communicating that something is wrong.

Pain can influence behavior.

So can neurological problems, sensory changes, anxiety and other medical conditions.

A significant behavioral change without an obvious explanation should therefore be discussed with a veterinarian.

13. Excessive Licking

Dogs lick themselves for many reasons, but excessive licking can sometimes indicate discomfort.

A dog that repeatedly licks a particular area may be experiencing:

• Skin irritation
• Allergies
• Infection
• Pain
• An injury
• Parasites

Constant licking can also damage the skin and create a cycle of inflammation.

14. Changes in Eyes or Vision

Eye problems can progress quickly in some situations.

Owners should pay attention to:

• Redness
• Squinting
• Excessive tearing
• Cloudiness
• Swelling
• Discharge
• Bumping into objects
• Sudden difficulty navigating familiar spaces

Sudden changes in vision should be evaluated promptly.

15. Changes in Hearing

Hearing loss can occur with aging, but a sudden change in responsiveness can have other causes.

A dog that stops responding to familiar sounds, appears startled when approached or behaves differently in the environment may be experiencing hearing impairment or another problem.

Veterinary evaluation can help determine the cause.

When Is a Dog's Symptom an Emergency?

Some symptoms should not wait for a routine appointment.

Seek emergency veterinary care if a dog experiences signs such as:

• Severe difficulty breathing
• Collapse or loss of consciousness
• Seizures
• Severe bleeding
• Sudden inability to stand or walk
• Severe abdominal swelling accompanied by distress
• Suspected poisoning
• Serious trauma
• Persistent vomiting with severe weakness
• Sudden severe neurological changes

When in doubt, contacting a veterinarian or emergency veterinary hospital can help determine how quickly the dog needs to be evaluated.

Don't Assume Every Change Is "Just Old Age"

One of the most important things owners can do for an aging dog is learn what is normal for that individual animal.

A gradual decrease in activity may be part of aging.

But a dog that suddenly stops walking normally, begins drinking excessively, loses weight, becomes confused or has difficulty breathing may be experiencing a medical problem.

The difference is important.

Dogs often hide pain and illness, which means subtle behavioral changes can sometimes be the first visible indication that something is wrong.

How Owners Can Monitor an Aging Dog

Keeping a simple record can make it easier to notice gradual changes.

Owners can monitor:

• Body weight
• Appetite
• Water consumption
• Urination
• Bowel movements
• Mobility
• Sleep
• Energy levels
• Coughing
• Breathing
• Skin and coat
• Dental health
• Behavior

Taking occasional photographs or short videos can also help document changes in mobility, breathing or behavior for discussion with a veterinarian.

Regular Veterinary Visits Matter

Routine veterinary examinations become particularly important as dogs age.

A veterinarian can evaluate a dog's weight, teeth, heart, lungs, mobility and overall health and may recommend blood, urine or other diagnostic testing based on the dog's age, history and symptoms.

Early detection does not guarantee that every disease can be prevented or cured, but identifying problems sooner can give owners and veterinarians more options for management and treatment.

Frequently Asked Questions

Is it normal for an older dog to sleep more?

Older dogs often sleep more than younger dogs. However, a sudden or dramatic change in sleep patterns, particularly when accompanied by confusion, pain or other symptoms, should be discussed with a veterinarian.

Why is my older dog suddenly having accidents in the house?

New house-soiling can have medical, mobility, behavioral or cognitive causes. It should not automatically be interpreted as a training problem.

Is bad breath normal in dogs?

Persistent bad breath can be associated with dental disease and should be evaluated, particularly when accompanied by changes in eating or chewing.

When should I worry about my dog's behavior?

A sudden or persistent change in behavior—including withdrawal, irritability, confusion, unusual aggression or loss of interest in normal activities—can warrant veterinary evaluation.

How can I tell if my dog is in pain?

Dogs can show pain through changes in movement, posture, appetite, sleep, interaction and behavior. Some dogs may hide obvious signs of discomfort, so subtle changes can be important.

The Bottom Line

Aging changes are a normal part of a dog's life, but not every new behavior or physical change should be dismissed as “just old age.”

Changes in appetite, thirst, weight, mobility, sleep, bathroom habits, breathing, vision, behavior or dental health can sometimes signal an underlying condition.

For dog owners, the key is to pay attention to what is different from the animal's normal routine.

When a change is sudden, persistent, worsening or accompanied by other symptoms, a veterinarian can help determine what is happening and whether treatment is necessary.

Your dog may not be able to tell you where it hurts—but changes in everyday behavior can sometimes provide important clues.