When you spot a sudden or unusual change in your pet’s behavior, it’s natural to feel concerned. While some changes can be a normal part of aging or adapting to a new environment, others may signal underlying health or emotional issues that need attention. At Pet Hospitals of Hawaii in Waipahu, we believe early recognition and intervention are key to keeping your pet happy and healthy. Here’s what you need to know about behavior changes in pets and when it’s time to reach out for help.
 

Sudden Aggression or Irritability

If your normally gentle pet becomes aggressive, snappy, or easily startled, it could be a sign of pain, discomfort, or fear. Conditions such as arthritis, dental disease, or neurological issues may cause a pet to react defensively when touched or approached.
 

Withdrawal or Hiding

Pets that become withdrawn, hide more than usual, or avoid interaction may be experiencing stress, anxiety, or illness. Changes in the home, such as new family members or pets, can also trigger this behavior.
 

Loss of Appetite or Increased Thirst

A significant change in eating or drinking habits can indicate a range of health concerns, from dental problems to kidney disease or diabetes. If your pet is refusing food, eating less, or suddenly drinking much more water, a veterinary evaluation is recommended.
 

House Soiling or Litter Box Issues

Accidents in the house or changes in litter box behavior can be due to urinary tract infections, gastrointestinal upset, or age-related decline. It’s important to distinguish between behavioral and medical causes, as timely treatment can prevent complications.
 

Vocalization Changes

Excessive barking, whining, yowling, or other changes in vocalization may reflect pain, cognitive decline, or anxiety, especially in older pets. Take note if these changes are accompanied by confusion or disorientation.
 

Changes in Grooming Habits

For cats, overgrooming or lack of grooming can point to skin problems, allergies, or stress. In dogs, excessive licking, biting, or scratching can also be a red flag.
 

Restlessness or Lethargy

A pet that is suddenly less active or, conversely, seems restless and unable to settle may be trying to communicate discomfort or pain. Both ends of the spectrum are worth discussing with your veterinarian.
 

What Might These Changes Mean?

Behavioral changes can be caused by a variety of physical and emotional factors, including:

• Medical Conditions: Pain, infections, metabolic disorders, or neurological issues

• Environmental Stress: Changes in household routine, new pets or people, moving homes

• Aging: Cognitive decline, arthritis, sensory loss

• Emotional Factors: Anxiety, depression, or trauma

Only a thorough veterinary examination can pinpoint the cause and determine the best course of action.
 

When to Be Concerned

While not every change means an emergency, it’s always better to be safe than sorry. Contact your veterinarian if your pet:

• Displays sudden, severe, or persistent behavioral changes

• Shows signs of pain, distress, or confusion

• Loses appetite, has trouble urinating or defecating, or vomits/has diarrhea

• Exhibits aggressive or self-destructive behavior

Early intervention can make a significant difference in your pet’s health and quality of life.
 

Your Pet’s Health and Happiness Are Our Top Priority

Understanding your pet’s behavior is a crucial part of responsible pet ownership. If you notice changes in your pet’s demeanor, habits, or routines, don’t ignore them. Our team is here to help you get to the root of the problem and support your pet’s well-being every step of the way.

If you’re concerned about a recent change in your pet’s behavior, contact Pet Hospitals of Hawaii in Waipahu to schedule an exam. Call (808) 671-7387 (PETS) to book an appointment today.