Is Your Pet Acting ? When Behavioral Changes Signal a Problem

At Westerville Veterinary Clinic, we understand how deeply you care about your pet—and how concerning it can be when their behavior suddenly changes. Since pets can’t tell us when something’s wrong, they often express discomfort, pain, or stress through behavior. Sudden shifts in how your pet acts may be more than just a “bad day”—they could signal a medical condition or emotional distress that needs attention.

In this guide, we’ll walk you through the most common causes of behavioral changes in dogs and cats, help you recognize when it’s time to seek veterinary care, and outline steps you can take at home to support your pet’s emotional and physical health.

Normal vs. Abnormal Pet Behavior: How to Tell the Difference

Understanding what’s typical—and what’s not—can help you detect problems early:

Normal Behaviors:

  • Curious exploration of surroundings
  • Playfulness and occasional restlessness
  • Mild nervousness around new experiences

Concerning Behavioral Changes:

  • Sudden aggression or withdrawal
  • Excessive vocalization—or unusual silence
  • Avoiding family members or hiding
  • Changes in appetite, sleep, or energy levels

For more on common dog behavior patterns, check out Common Dog Behavior Issues.

Why Is My Pet Acting Differently? Common Causes of Behavior Changes

Pain and Medical Conditions

Many pets hide pain instinctively. Behavioral changes might be your first (and only) clue that something’s wrong:

  • Arthritis or joint pain – reluctance to move, grumpiness, stiffness
  • Dental disease – pawing at the face, dropping food, avoiding eating
  • GI issues – vomiting, diarrhea, food aversion, lethargy

Learn more at What’s Wrong? Common Pet Pain Signs.

Neurological or Hormonal Disorders

Conditions that affect the brain or hormones can trigger dramatic behavior changes:

Stress, Anxiety, and Environmental Shifts

Behavior changes may also result from emotional stress or changes in the home:

  • New pets, guests, or major schedule changes
  • Separation anxiety or boredom
  • Loud noises (thunderstorms, fireworks, remodeling)

Signs include hiding, excessive grooming, panting, destruction, or clinginess. Read more on Addressing Tension Among Cats.

When to Contact a Veterinarian

Behavioral shifts aren’t always cause for alarm—but some require immediate attention. Contact us if you notice:

  • Sudden aggression or fearfulness
  • Noticeable weight change
  • Limping, tremors, or reluctance to move
  • Head pressing, disorientation, or seizures
  • Complete withdrawal from social interaction

See more at Behavioral Problems of Dogs – Merck Vet Manual.

How to Support Your Pet Through Behavioral Changes

Start with a Veterinary Exam

A full exam helps us rule out underlying conditions. This might include:

  • Physical and orthopedic assessment
  • Bloodwork to check organ function, thyroid levels, or infection
  • Neurological evaluation (especially for senior pets)

Make Strategic Changes at Home

For anxious or fearful pets:

  • Keep routines consistent
  • Use calming diffusers or thunder shirts
  • Provide puzzles or slow feeders for mental stimulation

For aging pets:

  • Use ramps or stairs to avoid joint strain
  • Offer supportive bedding
  • Switch to easily digestible food
  • Provide nightlights

In multi-pet homes:

  • Feed pets separately to reduce food aggression
  • Reintroduce pets slowly after fights or major changes
  • Provide plenty of vertical or private space for cats

Preventing Behavioral Changes Through Proactive Care

Prioritize Regular Wellness Exams

  • Annual (or biannual for senior pets) exams can uncover issues before they impact behavior.
  • Routine lab work can detect thyroid imbalances, diabetes, or pain-causing inflammation.

Enrich Your Pet’s Life

  • Train and socialize early—especially for dogs.
  • Rotate interactive toys and games to prevent boredom.
  • Provide both mental and physical exertion- sniffing time is just as important as walking.
  • Offer scratching posts, perches, or hideaways for cats.

Reduce Stressful Triggers

  • Introduce changes (like moving or new pets) gradually.
  • Keep noise levels down and provide safe retreat spaces.
  • Use calming tools like music or pheromone diffusers.
  • Chewing and sniffing are calming for pets; provide chewing toys or treats during potentially stressful times

Behavioral Changes Are Communication

Your pet’s behavior is their way of telling you how they feel—physically and emotionally. A change in mood, habits, or personality isn’t something to ignore. Whether it’s pain, stress, or confusion, they’re asking for help—and you don’t have to figure it out alone.

If you’ve noticed something different about your pet, reach out. The team at Westerville Veterinary Clinic is here to help you understand what’s behind those changes and restore comfort and confidence for your furry family member.

Contact Westerville Veterinary Clinic to schedule an appointment or speak with a member of our team.